diff --git a/tests/proto/arbitrary_obu.proto b/tests/proto/arbitrary_obu.proto
index 8eadc0e2..05981d45 100644
--- a/tests/proto/arbitrary_obu.proto
+++ b/tests/proto/arbitrary_obu.proto
@@ -8,13 +8,17 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
 import "obu_header.proto";
 
+option features.enum_type = CLOSED;
+
 enum ArbitraryObuType {
+  option allow_alias = true;
+
   OBU_IA_INVALID = 0;
   OBU_IA_CODEC_CONFIG = 1;
   OBU_IA_AUDIO_ELEMENT = 2;
@@ -40,7 +44,8 @@ enum ArbitraryObuType {
   OBU_IA_AUDIO_FRAME_ID_15 = 22;
   OBU_IA_AUDIO_FRAME_ID_16 = 23;
   OBU_IA_AUDIO_FRAME_ID_17 = 24;
-  OBU_IA_RESERVED_24 = 25;
+  OBU_IA_RESERVED_24 = 25 [deprecated = true];
+  OBU_IA_METADATA = 25;
   OBU_IA_RESERVED_25 = 26;
   OBU_IA_RESERVED_26 = 27;
   OBU_IA_RESERVED_27 = 28;
@@ -52,7 +57,11 @@ enum ArbitraryObuType {
 
 enum InsertionHook {
   INSERTION_HOOK_INVALID = 0;
+  // Places this before the canonical descriptors. In an MP4 context, this would
+  // be early in the "IACB" box.
   INSERTION_HOOK_BEFORE_DESCRIPTORS = 1;
+  // Places this after the canonical descriptors. In an MP4 context, this would
+  // be late in the "IACB" box.
   INSERTION_HOOK_AFTER_DESCRIPTORS = 2;
   INSERTION_HOOK_AFTER_IA_SEQUENCE_HEADER = 3;
   INSERTION_HOOK_AFTER_CODEC_CONFIGS = 4;
@@ -64,13 +73,15 @@ enum InsertionHook {
 }
 
 message ArbitraryObuMetadata {
-  optional InsertionHook insertion_hook = 1;
-  optional ArbitraryObuType obu_type = 4;
-  optional ObuHeaderMetadata obu_header = 2;
-  optional bytes payload = 3;
+  InsertionHook insertion_hook = 1;
+  ArbitraryObuType obu_type = 4;
+  ObuHeaderMetadata obu_header = 2;
+  bytes payload = 3;
+
   // Used to force the bitstream to be invalid when this OBU is inserted.
-  optional bool invalidates_bitstream = 5;
+  bool invalidates_bitstream = 5;
+
   // Used to control the temporal unit when using the *_AT_TICK insertion hooks.
   // Ignored otherwise.
-  optional int64 insertion_tick = 6;
+  int64 insertion_tick = 6;
 }
diff --git a/tests/proto/audio_element.proto b/tests/proto/audio_element.proto
index 2c91ff95..b8a78c69 100644
--- a/tests/proto/audio_element.proto
+++ b/tests/proto/audio_element.proto
@@ -8,32 +8,41 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
 import "obu_header.proto";
 import "param_definitions.proto";
 
+option features.enum_type = CLOSED;
+
 enum AudioElementType {
   AUDIO_ELEMENT_INVALID = 0;
   AUDIO_ELEMENT_CHANNEL_BASED = 1;
   AUDIO_ELEMENT_SCENE_BASED = 2;
+  AUDIO_ELEMENT_OBJECT_BASED = 3;
 }
 
 message ParamDefinitionExtension {
-  optional uint32 param_definition_size = 1;
-  optional bytes param_definition_bytes = 2;
+  // `param_definition_size` is ignored. The value in the bitstream is inferred
+  // based on the size of `param_definition_bytes`.
+  uint32 param_definition_size = 1 [deprecated = true];
+  bytes param_definition_bytes = 2;
 }
 
 message AudioElementParam {
-  optional uint32 deprecated_param_definition_type = 1 [deprecated = true];
-  optional ParamDefinitionType param_definition_type = 5;
+  uint32 deprecated_param_definition_type = 1 [deprecated = true];
+
+  ParamDefinitionType param_definition_type = 5;
+
   oneof param_definition {
     DemixingParamDefinition demixing_param = 2;
     ReconGainParamDefinition recon_gain_param = 3;
     ParamDefinitionExtension param_definition_extension = 4;
   }
+
+  // Next ID: 6
 }
 
 // Valid proto enums start at index 1, which are different from the
@@ -70,27 +79,36 @@ enum ExpandedLoudspeakerLayout {
   EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_SI = 11;
   EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_TP_SI = 12;
   EXPANDED_LOUDSPEAKER_LAYOUT_TOP_6_CH = 13;
-  EXPANDED_LOUDSPEAKER_LAYOUT_RESERVED_13 = 14;
+  EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH = 14;
+  EXPANDED_LOUDSPEAKER_LAYOUT_LFE_PAIR = 15;
+  EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_3_CH = 16;
+  EXPANDED_LOUDSPEAKER_LAYOUT_7_1_5_4_CH = 17;
+  EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_4_CH = 18;
+  EXPANDED_LOUDSPEAKER_LAYOUT_TOP_1_CH = 19;
+  EXPANDED_LOUDSPEAKER_LAYOUT_TOP_5_CH = 20;
   EXPANDED_LOUDSPEAKER_LAYOUT_RESERVED_255 = 256;
 }
 
 message ChannelAudioLayerConfig {
-  optional uint32 deprecated_loudspeaker_layout = 1 [deprecated = true];
-  optional LoudspeakerLayout loudspeaker_layout = 10;
-  optional uint32 output_gain_is_present_flag = 2;
-  optional uint32 recon_gain_is_present_flag = 3;
-  optional uint32 reserved_a = 4;
-  optional uint32 substream_count = 5;
-  optional uint32 coupled_substream_count = 6;
-  optional uint32 output_gain_flag = 7;
-  optional uint32 reserved_b = 8;
-  optional int32 output_gain = 9;
-  optional ExpandedLoudspeakerLayout expanded_loudspeaker_layout = 11;
+  uint32 deprecated_loudspeaker_layout = 1 [deprecated = true];
+
+  LoudspeakerLayout loudspeaker_layout = 10;
+  uint32 output_gain_is_present_flag = 2;
+  uint32 recon_gain_is_present_flag = 3;
+  uint32 reserved_a = 4;
+  uint32 substream_count = 5;
+  uint32 coupled_substream_count = 6;
+  uint32 output_gain_flag = 7;
+  uint32 reserved_b = 8;
+  int32 output_gain = 9;
+  ExpandedLoudspeakerLayout expanded_loudspeaker_layout = 11;
 }
 
 message ScalableChannelLayoutConfig {
-  optional uint32 num_layers = 1;
-  optional uint32 reserved = 2;
+  // `num_layers` is ignored. The value in the bitstream is inferred based on
+  // the number of `channel_audio_layer_configs`.
+  uint32 num_layers = 1 [deprecated = true];
+  uint32 reserved = 2;
   repeated ChannelAudioLayerConfig channel_audio_layer_configs = 3;
 }
 
@@ -101,44 +119,59 @@ enum AmbisonicsMode {
 }
 
 message AmbisonicsMonoConfig {
-  optional uint32 output_channel_count = 1;
-  optional uint32 substream_count = 2;
-  repeated uint32 channel_mapping = 3 [packed = true];
+  uint32 output_channel_count = 1;
+  uint32 substream_count = 2;
+  repeated uint32 channel_mapping = 3;
 }
 
 message AmbisonicsProjectionConfig {
-  optional uint32 output_channel_count = 1;
-  optional uint32 substream_count = 2;
-  optional uint32 coupled_substream_count = 3;
-  repeated int32 demixing_matrix = 4 [packed = true];
+  uint32 output_channel_count = 1;
+  uint32 substream_count = 2;
+  uint32 coupled_substream_count = 3;
+  repeated int32 demixing_matrix = 4;
 }
 
 message AmbisonicsConfig {
-  optional AmbisonicsMode ambisonics_mode = 1;
+  AmbisonicsMode ambisonics_mode = 1;
+
   oneof ambisonics_config {
     AmbisonicsMonoConfig ambisonics_mono_config = 2;
     AmbisonicsProjectionConfig ambisonics_projection_config = 3;
   }
 }
 
+message ObjectsConfig {
+  uint32 num_objects = 1;
+  bytes objects_config_extension_bytes = 2;
+}
+
 message AudioElementConfigExtension {
-  optional uint32 audio_element_config_size = 1;
-  optional bytes audio_element_config_bytes = 2;
+  // `audio_element_config_size` is ignored. The value in the bitstream is
+  // inferred based on the size of `audio_element_config_bytes`.
+  uint32 audio_element_config_size = 1 [deprecated = true];
+  bytes audio_element_config_bytes = 2;
 }
 
 message AudioElementObuMetadata {
-  optional uint32 audio_element_id = 1;
-  optional AudioElementType audio_element_type = 2;
-  optional uint32 reserved = 3;
-  optional uint32 codec_config_id = 4;
-  optional uint32 num_substreams = 5;
-  repeated uint32 audio_substream_ids = 6 [packed = true];
-  optional uint32 num_parameters = 7;
+  uint32 audio_element_id = 1;
+  AudioElementType audio_element_type = 2;
+  uint32 reserved = 3;
+  uint32 codec_config_id = 4;
+  // `num_substreams` is ignored. The value in the bitstream is inferred based
+  // on the number of `audio_substream_ids`.
+  uint32 num_substreams = 5 [deprecated = true];
+  repeated uint32 audio_substream_ids = 6;
+  // `num_parameters` is ignored. The value in the bitstream is inferred based
+  // on the number of `audio_element_params`.
+  uint32 num_parameters = 7 [deprecated = true];
   repeated AudioElementParam audio_element_params = 8;
+
   oneof config {
     ScalableChannelLayoutConfig scalable_channel_layout_config = 9;
     AmbisonicsConfig ambisonics_config = 10;
     AudioElementConfigExtension audio_element_config_extension = 11;
+    ObjectsConfig objects_config = 13;
   }
-  optional ObuHeaderMetadata obu_header = 12;
+
+  ObuHeaderMetadata obu_header = 12;
 }
diff --git a/tests/proto/audio_frame.proto b/tests/proto/audio_frame.proto
index a0186e6c..f8e31c25 100644
--- a/tests/proto/audio_frame.proto
+++ b/tests/proto/audio_frame.proto
@@ -8,30 +8,207 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
+option features.utf8_validation = NONE;
+
+enum ChannelLabel {
+  option features.enum_type = CLOSED;
+
+  CHANNEL_LABEL_INVALID = 0;
+
+  reserved 1;  // Reserved for potential "omitted" label.
+
+  // Mono channels.
+  CHANNEL_LABEL_MONO = 2;
+
+  // Stereo or binaural channels.
+  CHANNEL_LABEL_L_2 = 3;
+  CHANNEL_LABEL_R_2 = 4;
+
+  // Channels for objects.
+  CHANNEL_LABEL_OBJECT_CHANNEL0 = 67;
+  CHANNEL_LABEL_OBJECT_CHANNEL1 = 68;
+
+  // Centre channel common to several layouts (e.g. 3.1.2, 5.x.y, 7.x.y).
+  CHANNEL_LABEL_CENTRE = 6;
+
+  // LFE channel common to several layouts (e.g. 3.1.2, 5.1.y, 7.1.y, 9.1.6).
+  CHANNEL_LABEL_LFE = 7;
+
+  // 3.1.2 surround channels.
+  CHANNEL_LABEL_L_3 = 8;
+  CHANNEL_LABEL_R_3 = 9;
+  CHANNEL_LABEL_LTF_3 = 10;
+  CHANNEL_LABEL_RTF_3 = 11;
+
+  // 5.x.y surround channels.
+  CHANNEL_LABEL_L_5 = 14;
+  CHANNEL_LABEL_R_5 = 15;
+  CHANNEL_LABEL_LS_5 = 16;
+  CHANNEL_LABEL_RS_5 = 17;
+
+  // Common channels between 5.1.2 and 7.1.2.
+  CHANNEL_LABEL_LTF_2 = 22;
+  CHANNEL_LABEL_RTF_2 = 23;
+
+  // Common channels between 5.1.4 and 7.1.4.
+  CHANNEL_LABEL_LTF_4 = 26;
+  CHANNEL_LABEL_RTF_4 = 27;
+  CHANNEL_LABEL_LTB_4 = 28;
+  CHANNEL_LABEL_RTB_4 = 29;
+
+  // 7.x.y surround channels.
+  CHANNEL_LABEL_L_7 = 32;
+  CHANNEL_LABEL_R_7 = 33;
+  CHANNEL_LABEL_LSS_7 = 34;
+  CHANNEL_LABEL_RSS_7 = 35;
+  CHANNEL_LABEL_LRS_7 = 36;
+  CHANNEL_LABEL_RRS_7 = 37;
+
+  // 9.1.6 surround channels.
+  CHANNEL_LABEL_FLC = 42;
+  CHANNEL_LABEL_FC = 43;
+  CHANNEL_LABEL_FRC = 44;
+  CHANNEL_LABEL_FL = 45;
+  CHANNEL_LABEL_FR = 46;
+  CHANNEL_LABEL_SI_L = 47;
+  CHANNEL_LABEL_SI_R = 48;
+  CHANNEL_LABEL_BL = 49;
+  CHANNEL_LABEL_BR = 50;
+  CHANNEL_LABEL_TP_FL = 51;
+  CHANNEL_LABEL_TP_FR = 52;
+  CHANNEL_LABEL_TP_SI_L = 53;
+  CHANNEL_LABEL_TP_SI_R = 54;
+  CHANNEL_LABEL_TP_BL = 55;
+  CHANNEL_LABEL_TP_BR = 56;
+
+  // Additional channels for 10.2.9.3.
+  CHANNEL_LABEL_BC = 57;
+  CHANNEL_LABEL_LFE2 = 58;
+  CHANNEL_LABEL_TP_FC = 59;
+  CHANNEL_LABEL_TP_C = 60;
+  CHANNEL_LABEL_TP_BC = 61;
+  CHANNEL_LABEL_BT_FC = 62;
+  CHANNEL_LABEL_BT_FL = 63;
+  CHANNEL_LABEL_BT_FR = 64;
+
+  // Reserved for possible use of demixed labels.
+  reserved 5, 12, 13, 18 to 21, 24, 25, 30, 31, 38 to 41;
+
+  // Additional channels for 7.1.5.4.
+  CHANNEL_LABEL_BT_BL = 65;
+  CHANNEL_LABEL_BT_BR = 66;
+
+  // Reserved for channel-based labels.
+  reserved 69 to 999;
+
+  CHANNEL_LABEL_A_0 = 1000;
+  CHANNEL_LABEL_A_1 = 1001;
+  CHANNEL_LABEL_A_2 = 1002;
+  CHANNEL_LABEL_A_3 = 1003;
+  CHANNEL_LABEL_A_4 = 1004;
+  CHANNEL_LABEL_A_5 = 1005;
+  CHANNEL_LABEL_A_6 = 1006;
+  CHANNEL_LABEL_A_7 = 1007;
+  CHANNEL_LABEL_A_8 = 1008;
+  CHANNEL_LABEL_A_9 = 1009;
+  CHANNEL_LABEL_A_10 = 1010;
+  CHANNEL_LABEL_A_11 = 1011;
+  CHANNEL_LABEL_A_12 = 1012;
+  CHANNEL_LABEL_A_13 = 1013;
+  CHANNEL_LABEL_A_14 = 1014;
+  CHANNEL_LABEL_A_15 = 1015;
+  CHANNEL_LABEL_A_16 = 1016;
+  CHANNEL_LABEL_A_17 = 1017;
+  CHANNEL_LABEL_A_18 = 1018;
+  CHANNEL_LABEL_A_19 = 1019;
+  CHANNEL_LABEL_A_20 = 1020;
+  CHANNEL_LABEL_A_21 = 1021;
+  CHANNEL_LABEL_A_22 = 1022;
+  CHANNEL_LABEL_A_23 = 1023;
+  CHANNEL_LABEL_A_24 = 1024;
+
+  reserved 1025 to 1224;  // Reserved for future ambisonics channels.
+
+  // Next ID: 69 (channel-based) or 1025 (ambisonics).
+}
+
+// Wrapper around the `ChannelLabel` enum to allow for serialization to the
+// protocol buffer wire format.
+message ChannelLabelMessage {
+  ChannelLabel channel_label = 1;
+}
+
+message ChannelMetadata {
+  // Used to map the index of the channel in an ADM or WAV file. Ignored when
+  // data comes from other sources.
+  uint32 channel_id = 1;
+
+  // The IAMF-based channel label.
+  ChannelLabel channel_label = 2;
+}
+
 message AudioFrameObuMetadata {
-  optional string wav_filename = 1;
-  reserved 2;
-  reserved 3;
+  reserved 2, 3, 7, 8;
+  reserved channel_ids, channel_labels;
+
+  string wav_filename = 1;
+
+  // Controls whether the number of samples required to pad the final frame are
+  // automatically added to the `samples_to_trim_at_end` value.
+  //
+  // When `true` `samples_to_trim_at_end` matches `num_samples_to_trim_at_end`
+  // in the OBU header. If the actual value is too small to account for padding,
+  // then encoding will fail. This is useful to closely represent the value in
+  // the OBU (rarely needed).
+  //
+  // When `false` `num_samples_to_trim_at_end` will be incremented by the
+  // amount of required padding and may not match the OBU header value. This is
+  // useful to closely represent the trimming applied to the original audio
+  // content (typically recommended).
+  //
+  // Typically the recommended settings are:
+  //   - samples_to_trim_at_end_includes_padding: false
+  //   - samples_to_trim_at_end: 0
+  // These settings will automatically insert the correct padding to create a
+  // valid final frame and avoid trimming the original audio content.
+  bool samples_to_trim_at_end_includes_padding = 9 [default = true];
+
+  uint32 samples_to_trim_at_end = 4;
+
+  // Controls whether the number of samples required by codec delay for the
+  // initial first frames are automatically added to the
+  // `samples_to_trim_at_start` value.
+  //
+  // When `true` `samples_to_trim_at_start` relates directly to
+  // `samples_to_trim_at_start`s in the initial OBU header. If the actual
+  // value is too small to account for codec delay, then encoding will fail.
+  // This is useful to closely represent the values in the initial OBUs (rarely
+  // needed).
+  //
+  // When `false` `samples_to_trim_at_start` will be incremented by the
+  // amount of required for the codec delay and may not match the OBU header
+  // value. This is useful to closely represent the trimming applied to the
+  // original audio content (typically recommended).
+  //
+  // Typically the recommended settings are:
+  //   - samples_to_trim_at_start_includes_codec_delay: false
+  //   - samples_to_trim_at_start: 0
+  // These settings will automatically insert the correct codec delay to create
+  // a valid final frame and avoid trimming the original audio content.
+  bool samples_to_trim_at_start_includes_codec_delay = 10 [default = true];
 
-  // Trimming information.
-  optional uint32 samples_to_trim_at_end = 4;
-  optional uint32 samples_to_trim_at_start = 5;
+  uint32 samples_to_trim_at_start = 5;
 
   // ID of the audio element whose substreams will be provided/mixed
   // from the channels in this WAV file.
-  optional uint32 audio_element_id = 6;
+  uint32 audio_element_id = 6;
 
-  // Channels used in this WAV file, in the order as described in [ITU2051-3]
-  // for loudspeaker layouts or ACN order for ambisonics. May be fewer than
-  // the total number of channels in the WAV file if only a subset is to be
-  // used.
-  repeated uint32 channel_ids = 7 [packed = true];
+  // Metadata for each channel.
+  repeated ChannelMetadata channel_metadatas = 11;
 
-  // Channel Labels, e.g. "L2", "Ls5". For ambisonics, use "A{ACN number}",
-  // e.g. "A0", "A13". Must be of the same length as `channel_ids`.
-  repeated string channel_labels = 8;
+  // Next ID: 12
 }
diff --git a/tests/proto/codec_config.proto b/tests/proto/codec_config.proto
index b36fb696..83456359 100644
--- a/tests/proto/codec_config.proto
+++ b/tests/proto/codec_config.proto
@@ -8,12 +8,14 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
 import "obu_header.proto";
 
+option features.enum_type = CLOSED;
+
 // Valid proto enums start at index 1, which are different from the
 // corresponding enums in C++, e.g. kLpcmBigEndian = 0.
 enum LpcmFormatFlags {
@@ -23,9 +25,9 @@ enum LpcmFormatFlags {
 }
 
 message LpcmDecoderConfig {
-  optional LpcmFormatFlags sample_format_flags = 1;
-  optional uint32 sample_size = 2;
-  optional uint32 sample_rate = 3;
+  LpcmFormatFlags sample_format_flags = 1;
+  uint32 sample_size = 2;
+  uint32 sample_rate = 3;
 }
 
 enum OpusApplicationFlag {
@@ -37,8 +39,8 @@ enum OpusApplicationFlag {
 
 // Settings to configure `libopus`.
 message OpusEncoderMetadata {
-  optional OpusApplicationFlag application = 2;
-  optional bool use_float_api = 3 [default = true];
+  OpusApplicationFlag application = 2;
+  bool use_float_api = 3 [default = true];
 
   // Fields to control the bitrate.
   //
@@ -48,19 +50,28 @@ message OpusEncoderMetadata {
   //    - One channel: `target_bitrate_per_channel`.
   //    - Two channels: `target_bitrate_per_channel * 2 *
   //  coupling_rate_adjustment`.
-  optional int32 target_bitrate_per_channel = 1;
-  optional float coupling_rate_adjustment = 4 [default = 1.0];
+  int32 target_bitrate_per_channel = 1;
+  // The coupling rate adjustment should be in the range [0.5, 1.0].
+  // At the lower bound, the effective bitrate for coupled channels would be
+  // the same as a mono channel, for highly correlated signals.
+  // At the upper bound, the effective bitrate for a coupled channel would be
+  // two times the rate for a mono channel, for highly disparate signals.
+  float coupling_rate_adjustment = 4 [default = 1.0];
+
   map<uint32, int32> substream_id_to_bitrate_override = 5;
 }
 
 message OpusDecoderConfig {
-  optional uint32 version = 1;
-  optional uint32 output_channel_count = 2 [default = 2];
-  optional uint32 pre_skip = 3;
-  optional uint32 input_sample_rate = 4;
-  optional int32 output_gain = 5 [default = 0];
-  optional uint32 mapping_family = 6 [default = 0];
-  optional OpusEncoderMetadata opus_encoder_metadata = 7;
+  uint32 version = 1;
+  uint32 output_channel_count = 2 [default = 2];
+
+  uint32 pre_skip = 3;
+  uint32 input_sample_rate = 4;
+  int32 output_gain = 5 [default = 0];
+
+  uint32 mapping_family = 6 [default = 0];
+
+  OpusEncoderMetadata opus_encoder_metadata = 7;
 }
 
 enum SampleFrequencyIndex {
@@ -71,7 +82,7 @@ enum SampleFrequencyIndex {
   AAC_SAMPLE_FREQUENCY_INDEX_48000 = 4;
   AAC_SAMPLE_FREQUENCY_INDEX_44100 = 5;
   AAC_SAMPLE_FREQUENCY_INDEX_32000 = 6;
-  AAC_SAMPLE_FREQUENCY_INDEX_23000 = 7;
+  AAC_SAMPLE_FREQUENCY_INDEX_24000 = 7;
   AAC_SAMPLE_FREQUENCY_INDEX_22050 = 8;
   AAC_SAMPLE_FREQUENCY_INDEX_16000 = 9;
   AAC_SAMPLE_FREQUENCY_INDEX_12000 = 10;
@@ -80,42 +91,54 @@ enum SampleFrequencyIndex {
   AAC_SAMPLE_FREQUENCY_INDEX_7350 = 13;
   AAC_SAMPLE_FREQUENCY_INDEX_RESERVED_A = 14;
   AAC_SAMPLE_FREQUENCY_INDEX_RESERVED_B = 15;
-  AAC_SAMPLE_FREQUENCY_INDEX_ESCAPE_VALUE = 16;
+  AAC_SAMPLE_FREQUENCY_INDEX_ESCAPE_VALUE = 16 [deprecated = true];
 }
 
 // Settings to configure `fdk_aac`.
 message AacEncoderMetadata {
-  optional int32 bitrate_mode = 1;
-  optional bool enable_afterburner = 2 [default = true];
-  optional int32 signaling_mode = 3 [default = 2];
+  int32 bitrate_mode = 1;
+  bool enable_afterburner = 2 [default = true];
+
+  int32 signaling_mode = 3 [default = 2];
 }
 
 message AacDecoderSpecificInfo {
-  optional uint32 decoder_specific_info_descriptor_tag = 5 [default = 0x05];
-  optional uint32 audio_object_type = 1 [default = 2];
-  optional SampleFrequencyIndex sample_frequency_index = 2;
-  optional uint32 sampling_frequency = 3;
-  optional uint32 channel_configuration = 4 [default = 2];
+  uint32 decoder_specific_info_descriptor_tag = 5 [default = 0x05];
+
+  uint32 audio_object_type = 1 [default = 2];
+
+  SampleFrequencyIndex sample_frequency_index = 2;
+  uint32 sampling_frequency = 3 [deprecated = true];
+  uint32 channel_configuration = 4 [default = 2];
+
+  // Next ID: 6
 }
 
 message AacGaSpecificConfig {
-  optional bool frame_length_flag = 1 [default = false];
-  optional bool depends_on_core_coder = 2 [default = false];
-  optional bool extension_flag = 3 [default = false];
+  bool frame_length_flag = 1 [default = false];
+
+  bool depends_on_core_coder = 2 [default = false];
+
+  bool extension_flag = 3 [default = false];
 }
 
 message AacDecoderConfig {
-  optional uint32 decoder_config_descriptor_tag = 11 [default = 0x04];
-  optional uint32 object_type_indication = 1 [default = 0x40];
-  optional uint32 stream_type = 2 [default = 5];
-  optional bool upstream = 3 [default = false];
-  optional bool reserved = 4 [default = true];  // As per ISO 14496-1:2010.
-  optional uint32 buffer_size_db = 5;
-  optional uint32 max_bitrate = 6;
-  optional uint32 average_bit_rate = 7;
-  optional AacDecoderSpecificInfo decoder_specific_info = 8;
-  optional AacGaSpecificConfig ga_specific_config = 9;
-  optional AacEncoderMetadata aac_encoder_metadata = 10;
+  uint32 decoder_config_descriptor_tag = 11 [default = 0x04];
+
+  uint32 object_type_indication = 1 [default = 0x40];
+
+  uint32 stream_type = 2 [default = 5];
+
+  bool upstream = 3 [default = false];
+
+  bool reserved = 4 [default = true];  // As per ISO 14496-1:2010.
+
+  uint32 buffer_size_db = 5;
+  uint32 max_bitrate = 6;
+  uint32 average_bit_rate = 7;
+  AacDecoderSpecificInfo decoder_specific_info = 8;
+  AacGaSpecificConfig ga_specific_config = 9;
+  AacEncoderMetadata aac_encoder_metadata = 10;
 }
 
 enum FlacBlockType {
@@ -130,32 +153,38 @@ enum FlacBlockType {
 }
 
 message FlacMetaBlockHeader {
-  optional bool last_metadata_block_flag = 1;
-  optional FlacBlockType block_type = 2;
-  optional uint32 metadata_data_block_length = 3;
+  // Ignored, inferred by the order of repeated fields.
+  bool last_metadata_block_flag = 1 [deprecated = true];
+  FlacBlockType block_type = 2;
+  // Ignored, inferred from the block type and payload size.
+  uint32 metadata_data_block_length = 3 [deprecated = true];
 }
 
 message FlacMetaBlockStreamInfo {
-  optional uint32 minimum_block_size = 1;
-  optional uint32 maximum_block_size = 2;
-  optional uint32 minimum_frame_size = 3 [default = 0];
-  optional uint32 maximum_frame_size = 4 [default = 0];
-  optional uint32 sample_rate = 5;
-  optional uint32 number_of_channels = 6 [default = 1];
-  optional uint32 bits_per_sample = 7;
-  optional uint64 total_samples_in_stream = 8;
-  optional bytes md5_signature = 9
+  uint32 minimum_block_size = 1;
+  uint32 maximum_block_size = 2;
+  uint32 minimum_frame_size = 3 [default = 0];
+
+  uint32 maximum_frame_size = 4 [default = 0];
+
+  uint32 sample_rate = 5;
+  uint32 number_of_channels = 6 [default = 1];
+
+  uint32 bits_per_sample = 7;
+  uint64 total_samples_in_stream = 8;
+  bytes md5_signature = 9
       [default =
-           "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"];
+           "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"];
 }
 
 // Settings to configure `libflac`.
 message FlacEncoderMetadata {
-  optional uint32 compression_level = 1;
+  uint32 compression_level = 1;
 }
 
 message FlacMetaBlock {
-  optional FlacMetaBlockHeader header = 1;
+  FlacMetaBlockHeader header = 1;
+
   oneof data {
     FlacMetaBlockStreamInfo stream_info = 2;
     bytes generic_block = 3;
@@ -163,8 +192,10 @@ message FlacMetaBlock {
 }
 
 message FlacDecoderConfig {
+  reserved 1, 2;
+
   repeated FlacMetaBlock metadata_blocks = 3;
-  optional FlacEncoderMetadata flac_encoder_metadata = 4;
+  FlacEncoderMetadata flac_encoder_metadata = 4;
 }
 
 enum CodecId {
@@ -176,21 +207,36 @@ enum CodecId {
 }
 
 message CodecConfig {
-  optional uint32 deprecated_codec_id = 1 [deprecated = true];
-  optional CodecId codec_id = 10;
-  optional uint32 num_samples_per_frame = 2;
   reserved 3, 4;
-  optional int32 audio_roll_distance = 9;
+
+  uint32 deprecated_codec_id = 1 [deprecated = true];
+
+  CodecId codec_id = 10;
+  uint32 num_samples_per_frame = 2;
+  int32 audio_roll_distance = 9;
+
   oneof decoder_config {
     LpcmDecoderConfig decoder_config_lpcm = 5;
     OpusDecoderConfig decoder_config_opus = 6;
     AacDecoderConfig decoder_config_aac = 7;
     FlacDecoderConfig decoder_config_flac = 8;
   }
+
+  // If true, the codec-delay related fields will be ignored and automatically
+  // determined. For example, the OpusDecoderConfig.pre_skip field will be
+  // ignored and set to the number of samples reported by the underlying encoder
+  // library.
+  bool automatically_override_codec_delay = 11 [default = true];
+
+  // If true, the `audio_roll_distance` will be ignored and automatically be set
+  // to the correct value.
+  bool automatically_override_audio_roll_distance = 12 [default = true];
+
+  // Next ID: 13
 }
 
 message CodecConfigObuMetadata {
-  optional uint32 codec_config_id = 1;
-  optional CodecConfig codec_config = 2;
-  optional ObuHeaderMetadata obu_header = 3;
+  uint32 codec_config_id = 1;
+  CodecConfig codec_config = 2;
+  ObuHeaderMetadata obu_header = 3;
 }
diff --git a/tests/proto/element_gain_offset_config.proto b/tests/proto/element_gain_offset_config.proto
new file mode 100644
index 00000000..3a273b0c
--- /dev/null
+++ b/tests/proto/element_gain_offset_config.proto
@@ -0,0 +1,35 @@
+// Copyright (c) 2026, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 3-Clause Clear License
+// and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+// License was not distributed with this source code in the LICENSE file, you
+// can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+// Alliance for Open Media Patent License 1.0 was not distributed with this
+// source code in the PATENTS file, you can obtain it at
+// www.aomedia.org/license/patent.
+
+edition = "2023";
+
+package libiamf_proto;
+
+import "types.proto";
+
+option java_outer_classname = "ElementGainOffsetConfig";
+option java_multiple_files = true;
+
+message ElementGainOffsetConfig {
+  message ValueType {
+    QFormatOrFloatingPoint element_gain_offset = 1;
+  }
+
+  message RangeType {
+    QFormatOrFloatingPoint default_element_gain_offset = 1;
+    QFormatOrFloatingPoint min_element_gain_offset = 2;
+    QFormatOrFloatingPoint max_element_gain_offset = 3;
+  }
+
+  oneof element_gain_offset_config_type {
+    ValueType value_type = 1;
+    RangeType range_type = 2;
+  }
+}
diff --git a/tests/proto/encoder_control_metadata.proto b/tests/proto/encoder_control_metadata.proto
new file mode 100644
index 00000000..8788f6f0
--- /dev/null
+++ b/tests/proto/encoder_control_metadata.proto
@@ -0,0 +1,31 @@
+// Copyright (c) 2025, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 3-Clause Clear License
+// and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+// License was not distributed with this source code in the LICENSE file, you
+// can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+// Alliance for Open Media Patent License 1.0 was not distributed with this
+// source code in the PATENTS file, you can obtain it at
+// www.aomedia.org/license/patent.
+
+edition = "2023";
+
+package libiamf_proto;
+
+import "output_audio_format.proto";
+
+// Controls for the encoder behavior.
+message EncoderControlMetadata {
+  // If true [default]: Each Mix Presentation OBU will get an extra
+  //                    `MixPresentationTag` with metadata describing the build
+  //                    information.
+  //  If false: The encoder omit adding an extra build information tag.
+  bool add_build_information_tag = 1 [default = true];
+
+  // Controls the output audio format for any rendered files. The encoder may
+  // produce rendered files as a side effect of the encoding process. The files
+  // are useful for debugging and as an approximation of what a decoder would
+  // generate when playing back the IAMF file.
+  OutputAudioFormat output_rendered_file_format = 2
+      [default = OUTPUT_FORMAT_NONE];
+}
diff --git a/tests/proto/ia_sequence_header.proto b/tests/proto/ia_sequence_header.proto
index e26d2ec8..5a72c9ac 100644
--- a/tests/proto/ia_sequence_header.proto
+++ b/tests/proto/ia_sequence_header.proto
@@ -8,23 +8,29 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
 import "obu_header.proto";
 
 enum ProfileVersion {
+  option features.enum_type = CLOSED;
+
   PROFILE_VERSION_INVALID = 0;
   PROFILE_VERSION_SIMPLE = 1;
   PROFILE_VERSION_BASE = 2;
   PROFILE_VERSION_BASE_ENHANCED = 3;
+  PROFILE_VERSION_BASE_ADVANCED = 4;
+  PROFILE_VERSION_ADVANCED1 = 5;
+  PROFILE_VERSION_ADVANCED2 = 6;
   PROFILE_VERSION_RESERVED_255 = 256;
 }
 
 message IASequenceHeaderObuMetadata {
-  optional uint32 ia_code = 1 [default = 0x69616d66 /* "iamf" */];
-  optional ProfileVersion primary_profile = 2;
-  optional ProfileVersion additional_profile = 3;
-  optional ObuHeaderMetadata obu_header = 4;
+  uint32 ia_code = 1 [default = 0x69616d66 /* "iamf" */, deprecated = true];
+
+  ProfileVersion primary_profile = 2;
+  ProfileVersion additional_profile = 3;
+  ObuHeaderMetadata obu_header = 4;
 }
diff --git a/tests/proto/metadata_obu.proto b/tests/proto/metadata_obu.proto
new file mode 100644
index 00000000..79bcd766
--- /dev/null
+++ b/tests/proto/metadata_obu.proto
@@ -0,0 +1,39 @@
+// Copyright (c) 2026, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 3-Clause Clear License
+// and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+// License was not distributed with this source code in the LICENSE file, you
+// can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+// Alliance for Open Media Patent License 1.0 was not distributed with this
+// source code in the PATENTS file, you can obtain it at
+// www.aomedia.org/license/patent.
+
+edition = "2023";
+
+package libiamf_proto;
+
+option java_multiple_files = true;
+option java_outer_classname = "MetadataObu";
+
+message MetadataITUTT35 {
+  uint32 itu_t_t35_country_code = 1;
+  // Only present if `itu_t_t35_country_code` is 0xFF.
+  uint32 itu_t_t35_country_code_extension_byte = 2;
+  bytes itu_t_t35_payload_bytes = 3;
+}
+
+message Tag {
+  string name = 1;
+  string value = 2;
+}
+
+message MetadataIamfTags {
+  repeated Tag tags = 1;
+}
+
+message MetadataObuMetadata {
+  oneof metadata {
+    MetadataITUTT35 metadata_itu_t_t35 = 2;
+    MetadataIamfTags metadata_iamf_tags = 3;
+  }
+}
diff --git a/tests/proto/mix_presentation.proto b/tests/proto/mix_presentation.proto
index a3973948..377b7b9a 100644
--- a/tests/proto/mix_presentation.proto
+++ b/tests/proto/mix_presentation.proto
@@ -8,67 +8,96 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
+import "element_gain_offset_config.proto";
 import "obu_header.proto";
 import "param_definitions.proto";
 
-message MixPresentationAnnotations {
-  option deprecated = true;
+option features.enum_type = CLOSED;
+option features.utf8_validation = NONE;
 
-  optional string mix_presentation_friendly_label = 1;
-}
-
-message MixPresentationElementAnnotations {
-  option deprecated = true;
+enum HeadPhonesRenderingMode {
+  option allow_alias = true;
 
-  optional string audio_element_friendly_label = 1;
+  HEADPHONES_RENDERING_MODE_INVALID = 0;
+  HEADPHONES_RENDERING_MODE_STEREO = 1;
+  // Spelling out `HEADPHONES_RENDERING_MODE_BINAURAL` or
+  // `HEADPHONES_RENDERING_MODE_RESERVED_2` is deprecated. Prefer the enums that
+  // explicitly state whether it is world-locked or head-locked. Historical uses
+  // will be automatically translated accordingly:
+  //
+  // - `HEADPHONES_RENDERING_MODE_BINAURAL` to
+  //   `HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED`.
+  // - `HEADPHONES_RENDERING_MODE_RESERVED_2` to
+  //   `HEADPHONES_RENDERING_MODE_BINAURAL_HEAD_LOCKED`.
+  HEADPHONES_RENDERING_MODE_BINAURAL = 2 [deprecated = true];
+  HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED = 2;
+  HEADPHONES_RENDERING_MODE_RESERVED_2 = 3 [deprecated = true];
+  HEADPHONES_RENDERING_MODE_BINAURAL_HEAD_LOCKED = 3;
+  HEADPHONES_RENDERING_MODE_RESERVED_3 = 4;
 }
 
-message ElementMixConfig {
-  option deprecated = true;
-
-  optional MixGainParamDefinition mix_gain = 1;
+enum BinauralFilterProfile {
+  BINAURAL_FILTER_PROFILE_INVALID = 0;
+  BINAURAL_FILTER_PROFILE_AMBIENT = 1;
+  BINAURAL_FILTER_PROFILE_DIRECT = 2;
+  BINAURAL_FILTER_PROFILE_REVERBERANT = 3;
+  BINAURAL_FILTER_PROFILE_RESERVED3 = 4;
 }
 
-enum HeadPhonesRenderingMode {
-  HEADPHONES_RENDERING_MODE_INVALID = 0;
-  HEADPHONES_RENDERING_MODE_STEREO = 1;
-  HEADPHONES_RENDERING_MODE_BINAURAL = 2;
-  HEADPHONES_RENDERING_MODE_RESERVED_2 = 3;
-  HEADPHONES_RENDERING_MODE_RESERVED_3 = 4;
+message RenderingConfigParamDefinition {
+  ParamDefinitionType param_definition_type = 1;
+  oneof param_definition {
+    PolarParamDefinition polar_param_definition = 2;
+    Cart8ParamDefinition cart8_param_definition = 4;
+    Cart16ParamDefinition cart16_param_definition = 5;
+    DualPolarParamDefinition dual_polar_param_definition = 6;
+    DualCart8ParamDefinition dual_cart8_param_definition = 7;
+    DualCart16ParamDefinition dual_cart16_param_definition = 8;
+    bytes param_definition_bytes = 3;
+  }
 }
 
 message RenderingConfig {
-  optional HeadPhonesRenderingMode headphones_rendering_mode = 1;
-  optional uint32 reserved = 2;
-  optional uint32 rendering_config_extension_size = 3;
-  optional bytes rendering_config_extension_bytes = 4;
+  HeadPhonesRenderingMode headphones_rendering_mode = 1;
+  BinauralFilterProfile binaural_filter_profile = 7
+      [default = BINAURAL_FILTER_PROFILE_AMBIENT];
+  uint32 reserved = 2;
+  uint32 rendering_config_extension_size = 3 [deprecated = true];
+  repeated RenderingConfigParamDefinition rendering_config_param_definitions =
+      5;
+  ElementGainOffsetConfig element_gain_offset_config = 6;
+  bytes rendering_config_extension_bytes = 4;
+
+  // Next ID: 8
 }
 
 message SubMixAudioElement {
-  optional uint32 audio_element_id = 1;
-  reserved 2;
-  // Superseded by `localized_element_annotations`.
-  repeated MixPresentationElementAnnotations
-      mix_presentation_element_annotations_array = 4 [deprecated = true];
-  // Length should be equal to `count_label` in the OBU.
-  repeated string localized_element_annotations = 6;
+  reserved 2, 3, 4;
+  reserved element_mix_config, mix_presentation_element_annotations_array;
 
-  optional RenderingConfig rendering_config = 5;
-  // Superseded by `element_mix_gain`.
-  optional ElementMixConfig element_mix_config = 3 [deprecated = true];
-  optional MixGainParamDefinition element_mix_gain = 7;
-}
+  uint32 audio_element_id = 1;
 
-message OutputMixConfig {
-  option deprecated = true;
+  // Annotations, for this audio element. The length should be `count_label`.
+  repeated string localized_element_annotations = 6;
+  RenderingConfig rendering_config = 5;
 
-  optional MixGainParamDefinition output_mix_gain = 1;
+  MixGainParamDefinition element_mix_gain = 7;
 }
 
+// See section 3.7.5 of the IAMF spec.
+//
+// IAMF pulls from various conventions.
+//
+// Sound systems A through J refer to ITU2051-3. Sound systems 10 through 14
+// refer to IAMF's own systems.
+//
+// Typically named in "A+B+C" convention, where A is the number of height
+// speakers, B is the number of surround speakers, and C is the number of
+// bottom speakers.
 enum SoundSystem {
   SOUND_SYSTEM_INVALID = 0;
   SOUND_SYSTEM_A_0_2_0 = 1;
@@ -81,19 +110,20 @@ enum SoundSystem {
   SOUND_SYSTEM_H_9_10_3 = 8;
   SOUND_SYSTEM_I_0_7_0 = 9;
   SOUND_SYSTEM_J_4_7_0 = 10;
-  SOUND_SYSTEM_10_2_7_0 = 11;
-  SOUND_SYSTEM_11_2_3_0 = 12;
-  SOUND_SYSTEM_12_0_1_0 = 13;
-  SOUND_SYSTEM_13_6_9_0 = 14;
+  SOUND_SYSTEM_10_2_7_0 = 11;  // IAMF's 7.1.2.
+  SOUND_SYSTEM_11_2_3_0 = 12;  // IAMF's 3.1.2.
+  SOUND_SYSTEM_12_0_1_0 = 13;  // Mono.
+  SOUND_SYSTEM_13_6_9_0 = 14;  // IAMF's 9.1.6.
+  SOUND_SYSTEM_14_5_7_4 = 15;  // IAMF's 7.1.5.4.
 }
 
 message LoudspeakersSsConventionLayout {
-  optional SoundSystem sound_system = 1;
-  optional uint32 reserved = 2;
+  SoundSystem sound_system = 1;
+  uint32 reserved = 2;
 }
 
 message LoudspeakersReservedOrBinauralLayout {
-  optional uint32 reserved = 1;
+  uint32 reserved = 1;
 }
 
 enum LayoutType {
@@ -105,8 +135,10 @@ enum LayoutType {
 }
 
 message Layout {
-  optional LayoutType layout_type = 1;
   reserved 2;
+
+  LayoutType layout_type = 1;
+
   oneof specific_layout {
     LoudspeakersSsConventionLayout ss_layout = 3;
     LoudspeakersReservedOrBinauralLayout reserved_or_binaural_layout = 4;
@@ -120,21 +152,34 @@ enum AnchorType {
   ANCHOR_TYPE_ALBUM = 3;
 }
 
+// Values are represented to align with the IAMF spec.
+//
+// See
+// https://aomediacodec.github.io/iamf/v1.1.0.html#obu-mixpresentation-loudness
+// for further details.
+//
+// See detailed examples on Q7.8 format below in `LoudnessInfo`.
 message AnchorElement {
-  optional AnchorType anchor_element = 1;
-  optional int32 anchored_loudness = 2;
+  AnchorType anchor_element = 1;
+  int32 anchored_loudness = 2;  // Q7.8.
 }
 
 message AnchoredLoudness {
-  optional uint32 num_anchored_loudness = 1;
+  // `num_anchored_loudness` is ignored. The value in the bitstream is inferred
+  // based on the number of `anchor_elements`.
+  uint32 num_anchored_loudness = 1 [deprecated = true];
+
   repeated AnchorElement anchor_elements = 2;
 }
 
 enum LoudnessInfoTypeBitMask {
+  option allow_alias = true;
+
   LOUDNESS_INFO_TYPE_INVALID = 0;
   LOUDNESS_INFO_TYPE_TRUE_PEAK = 1;
   LOUDNESS_INFO_TYPE_ANCHORED_LOUDNESS = 2;
-  LOUDNESS_INFO_TYPE_RESERVED_4 = 4;
+  LOUDNESS_INFO_TYPE_RESERVED_4 = 4 [deprecated = true];
+  LOUDNESS_INFO_TYPE_LIVE = 4;
   LOUDNESS_INFO_TYPE_RESERVED_8 = 8;
   LOUDNESS_INFO_TYPE_RESERVED_16 = 16;
   LOUDNESS_INFO_TYPE_RESERVED_32 = 32;
@@ -142,66 +187,120 @@ enum LoudnessInfoTypeBitMask {
   LOUDNESS_INFO_TYPE_RESERVED_128 = 128;
 }
 
+// Values are represented to align with the IAMF spec.
+//
+// See
+// https://aomediacodec.github.io/iamf/v1.1.0.html#obu-mixpresentation-loudness
+// for further details.
+//
+// To convert from dB to Q7.8, multiply by 256. Example:
+//  - For -3 dB, set the proto value to 256 * -3 = -768.
+//  - For +6 dB, set the proto value to 256 * 6 = 1536.
 message LoudnessInfo {
-  optional uint32 deprecated_info_type = 1 [deprecated = true];
-  repeated LoudnessInfoTypeBitMask info_type_bit_masks = 8 [packed = true];
-  optional int32 integrated_loudness = 2;
-  optional int32 digital_peak = 3;
-  optional int32 true_peak = 4;
-  optional AnchoredLoudness anchored_loudness = 5;
-  optional uint32 info_type_size = 6;
-  optional bytes info_type_bytes = 7;
+  uint32 deprecated_info_type = 1 [deprecated = true];
+
+  repeated LoudnessInfoTypeBitMask info_type_bit_masks = 8;
+  int32 integrated_loudness = 2;  // Q7.8.
+  int32 digital_peak = 3;         // Q7.8.
+  int32 true_peak = 4;            // Q7.8.
+  AnchoredLoudness anchored_loudness = 5;
+  uint32 info_type_size = 6 [deprecated = true];
+  bytes info_type_bytes = 7;
+
+  // Next ID: 9
 }
 
 message MixPresentationLayout {
-  optional Layout loudness_layout = 1;
-  optional LoudnessInfo loudness = 2;
+  Layout loudness_layout = 1;
+  LoudnessInfo loudness = 2;
 }
 
 message MixPresentationSubMix {
-  optional uint32 num_audio_elements = 1;
+  reserved 3;
+  reserved output_mix_config;
+
+  // `num_audio_elements` is ignored. The value in the bitstream is inferred
+  // based on the number of `audio_elements`.
+  uint32 num_audio_elements = 1 [deprecated = true];
+
   repeated SubMixAudioElement audio_elements = 2;
 
-  // Superseded by `output_mix_gain`.
-  optional OutputMixConfig output_mix_config = 3 [deprecated = true];
-  optional MixGainParamDefinition output_mix_gain = 6;
+  MixGainParamDefinition output_mix_gain = 6;
+
+  // `num_layouts` is ignored. The value in the bitstream is inferred
+  // based on the number of `layouts`.
+  uint32 num_layouts = 4 [deprecated = true];
 
-  optional uint32 num_layouts = 4;
   repeated MixPresentationLayout layouts = 5;
+
+  // Next ID: 7
 }
 
 message MixPresentationTag {
-  optional string tag_name = 1;
-  optional string tag_value = 2;
+  string tag_name = 1;
+  string tag_value = 2;
 }
 
 message MixPresentationTags {
-  optional uint32 num_tags = 1;
+  // `num_tags` is ignored. The value in the bitstream is inferred based on the
+  // number of tags.
+  uint32 num_tags = 1 [deprecated = true];
+
   repeated MixPresentationTag tags = 2;
 }
 
+enum PreferredLoudspeakerRenderer {
+  PREFERRED_LOUDSPEAKER_RENDERER_INVALID = 0;
+  PREFERRED_LOUDSPEAKER_RENDERER_NONE = 1;
+  PREFERRED_LOUDSPEAKER_RENDERER_RESERVED_255 = 256;
+}
+
+enum PreferredBinauralRenderer {
+  PREFERRED_BINAURAL_RENDERER_INVALID = 0;
+  PREFERRED_BINAURAL_RENDERER_NONE = 1;
+  PREFERRED_BINAURAL_RENDERER_RESERVED_255 = 256;
+}
+
+message MixPresentationOptionalFields {
+  // `optional_fields_size` is ignored. The value in the bitstream is inferred
+  // based on the size of `optional_fields_remaining_bytes`.
+  PreferredLoudspeakerRenderer preferred_loudspeaker_renderer = 1;
+  PreferredBinauralRenderer preferred_binaural_renderer = 2;
+  bytes optional_fields_remaining_bytes = 3;
+}
+
 message MixPresentationObuMetadata {
-  reserved 2;
-  optional uint32 mix_presentation_id = 1;
-  optional uint32 count_label = 5;
+  reserved 2, 6, 7;
+  reserved language_labels, mix_presentation_annotations_array;
+
+  uint32 mix_presentation_id = 1;
+  uint32 count_label = 5 [deprecated = true];
 
-  // Superseded by `annotations_language`.
-  repeated string language_labels = 6 [deprecated = true];
-  // Length should be equal to `count_label`.
+  // Language codes of the annotations themselves, infer the spec `count_label`
+  // from the length of this field.
   repeated string annotations_language = 9;
 
-  // Superseded by `localized_presentation_annotations`.
-  repeated MixPresentationAnnotations mix_presentation_annotations_array = 7
-      [deprecated = true];
-  // Length should be equal to `count_label`.
+  // Annotations, for this mix. The length should be `count_label`.
   repeated string localized_presentation_annotations = 10;
 
-  optional uint32 num_sub_mixes = 3;
-  repeated MixPresentationSubMix sub_mixes = 4;
+  // `num_sub_mixes` is ignored. The value in the bitstream is inferred
+  // based on the number of `sub_mixes`.
+  uint32 num_sub_mixes = 3 [deprecated = true];
 
-  // When true, `mix_presentation_tags` will be examined.
-  optional bool include_mix_presentation_tags = 11;
-  optional MixPresentationTags mix_presentation_tags = 12;
+  repeated MixPresentationSubMix sub_mixes = 4;
 
-  optional ObuHeaderMetadata obu_header = 8;
+  // When false [default]: The encoder will ignore the below
+  //                      `mix_presentation_tags`. Beware that other features
+  //                      may still result in additional non-user specified
+  //                      tags. To stricly encode a file without any tags, set
+  //                      both `include_mix_presentation_tags` and
+  //                      `EncoderControlMetadata.add_build_information_tag`
+  //                      fields to false.
+  // When true: The encoder will use the `mix_presentation_tags` field.
+  bool include_mix_presentation_tags = 11;
+  MixPresentationTags mix_presentation_tags = 12;
+  MixPresentationOptionalFields optional_fields = 13;
+  ObuHeaderMetadata obu_header = 8;
+
+  // Next ID: 14
 }
diff --git a/tests/proto/obu_header.proto b/tests/proto/obu_header.proto
index 47f9aefa..ee9bc73e 100644
--- a/tests/proto/obu_header.proto
+++ b/tests/proto/obu_header.proto
@@ -8,18 +8,32 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
 message ObuHeaderMetadata {
-  reserved 1;
-  optional bool obu_redundant_copy = 2 [default = false];
-  optional bool obu_trimming_status_flag = 3 [default = false];
-  optional bool obu_extension_flag = 4 [default = false];
-  reserved 5;
-  optional uint32 num_samples_to_trim_at_end = 6 [default = 0];
-  optional uint32 num_samples_to_trim_at_start = 7 [default = 0];
-  optional uint32 extension_header_size = 8 [default = 0];
-  optional bytes extension_header_bytes = 9 [default = ""];
+  reserved 1, 5;
+
+  bool obu_redundant_copy = 2 [default = false];
+
+  // TODO(b/475594651): Rename this flag to be more clear that it depends on the
+  //                    OBU type.
+  // Depending on the OBU type, this represents one of
+  // `obu_trimming_status_flag`, `is_not_key_frame`, `optional_fields_flag`, or
+  // `reserved`.
+  bool obu_trimming_status_flag = 3 [default = false];
+
+  bool obu_extension_flag = 4 [default = false];
+
+  uint32 num_samples_to_trim_at_end = 6 [default = 0];
+
+  uint32 num_samples_to_trim_at_start = 7 [default = 0];
+
+  // `extension_header_size` is ignored. The presence in the bitstream is
+  // determined by `obu_extension_flag`. The value in the bitstream is inferred
+  // based on the size of `extension_header_bytes`.
+  uint32 extension_header_size = 8 [default = 0, deprecated = true];
+
+  bytes extension_header_bytes = 9 [default = ""];
 }
diff --git a/tests/proto/output_audio_format.proto b/tests/proto/output_audio_format.proto
new file mode 100644
index 00000000..1ef69f05
--- /dev/null
+++ b/tests/proto/output_audio_format.proto
@@ -0,0 +1,31 @@
+// Copyright (c) 2025, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 3-Clause Clear License
+// and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+// License was not distributed with this source code in the LICENSE file, you
+// can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+// Alliance for Open Media Patent License 1.0 was not distributed with this
+// source code in the PATENTS file, you can obtain it at
+// www.aomedia.org/license/patent.
+
+edition = "2023";
+
+package libiamf_proto;
+
+enum OutputAudioFormat {
+  option features.enum_type = CLOSED;
+
+  OUTPUT_FORMAT_INVALID = 0;
+
+  // Omit output files.
+  OUTPUT_FORMAT_NONE = 1;
+
+  // Wav file output. Bit depth is automatically determined based on the
+  // underlying codec.
+  OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC = 2;
+
+  // Wav file output, with explicit bit depths.
+  OUTPUT_FORMAT_WAV_BIT_DEPTH_SIXTEEN = 3;
+  OUTPUT_FORMAT_WAV_BIT_DEPTH_TWENTY_FOUR = 4;
+  OUTPUT_FORMAT_WAV_BIT_DEPTH_THIRTY_TWO = 5;
+}
diff --git a/tests/proto/param_definitions.proto b/tests/proto/param_definitions.proto
index f8aa7dbc..e21e887b 100644
--- a/tests/proto/param_definitions.proto
+++ b/tests/proto/param_definitions.proto
@@ -8,7 +8,7 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
@@ -17,36 +17,112 @@ import "parameter_data.proto";
 // Valid proto enums start at index 1, which are different from the
 // corresponding enums in C++, e.g. kParameterDefinitionMixGain = 0.
 enum ParamDefinitionType {
+  option features.enum_type = CLOSED;
+
   PARAM_DEFINITION_TYPE_INVALID = 0;
   PARAM_DEFINITION_TYPE_MIX_GAIN = 1;
   PARAM_DEFINITION_TYPE_DEMIXING = 2;
   PARAM_DEFINITION_TYPE_RECON_GAIN = 3;
-  PARAM_DEFINITION_TYPE_RESERVED_3 = 4;
+  PARAM_DEFINITION_TYPE_POLAR = 4;
+  PARAM_DEFINITION_TYPE_CART_8 = 5;
+  PARAM_DEFINITION_TYPE_CART_16 = 6;
+  PARAM_DEFINITION_TYPE_DUAL_POLAR = 7;
+  PARAM_DEFINITION_TYPE_DUAL_CART_8 = 8;
+  PARAM_DEFINITION_TYPE_DUAL_CART_16 = 9;
+  PARAM_DEFINITION_TYPE_RESERVED_255 = 256;
 }
 
 message ParamDefinition {
-  optional uint32 parameter_id = 1;
-  optional uint32 parameter_rate = 2;
-  optional bool param_definition_mode = 3;
-  optional uint32 reserved = 4;
-  optional uint32 duration = 5;
-  optional uint32 constant_subblock_duration = 7;
-  optional uint32 num_subblocks = 6;
-  repeated uint32 subblock_durations = 8 [packed = true];
+  uint32 parameter_id = 1;
+  uint32 parameter_rate = 2;
+  bool param_definition_mode = 3;
+  uint32 reserved = 4;
+  uint32 duration = 5;
+  uint32 constant_subblock_duration = 7;
+  // `num_subblocks` is ignored. The value in the bitstream is inferred based on
+  // the number of `subblock_durations`.
+  uint32 num_subblocks = 6 [deprecated = true];
+  repeated uint32 subblock_durations = 8;
 }
 
+// Values are represented to align with the IAMF spec.
+//
+// See
+// https://aomediacodec.github.io/iamf/v1.1.0.html#syntax-mixgain-parameter-definition
+// for further details.
+//
+// To convert from dB to Q7.8, multiply by 256. Example:
+//  - For -3 dB, set the proto value to 256 * -3 = -768.
+//  - For +6 dB, set the proto value to 256 * 6 = 1536.
 message MixGainParamDefinition {
-  optional ParamDefinition param_definition = 1;
-  optional int32 default_mix_gain = 2;
+  ParamDefinition param_definition = 1;
+  int32 default_mix_gain = 2;  // Q7.8.
 }
 
 message DemixingParamDefinition {
-  optional ParamDefinition param_definition = 1;
-  optional DemixingInfoParameterData default_demixing_info_parameter_data = 2;
-  optional uint32 default_w = 3;
-  optional uint32 reserved = 4;
+  ParamDefinition param_definition = 1;
+  DemixingInfoParameterData default_demixing_info_parameter_data = 2;
+  uint32 default_w = 3;
+  uint32 reserved = 4;
 }
 
 message ReconGainParamDefinition {
-  optional ParamDefinition param_definition = 1;
+  ParamDefinition param_definition = 1;
+}
+
+message PolarParamDefinition {
+  ParamDefinition param_definition = 1;
+  int32 default_azimuth = 2;  // 9 bits.
+  // `default_azimuth` is clipped to [-180, 180].
+  int32 default_elevation = 3;  // 8 bits.
+  // `default_elevation` is clipped to [-90, 90].
+  int32 default_distance = 4;  // 7 bits.
+}
+
+message Cart8ParamDefinition {
+  ParamDefinition param_definition = 1;
+  int32 default_x = 2;  // 8 bits.
+  int32 default_y = 3;  // 8 bits.
+  int32 default_z = 4;  // 8 bits.
+}
+
+message Cart16ParamDefinition {
+  ParamDefinition param_definition = 1;
+  int32 default_x = 2;  // 16 bits.
+  int32 default_y = 3;  // 16 bits.
+  int32 default_z = 4;  // 16 bits.
+}
+
+message DualPolarParamDefinition {
+  ParamDefinition param_definition = 1;
+  int32 default_first_azimuth = 2;  // 9 bits.
+  // `default_first_azimuth` is clipped to [-180, 180].
+  int32 default_first_elevation = 3;  // 8 bits.
+  // `default_first_elevation` is clipped to [-90, 90].
+  int32 default_first_distance = 4;  // 7 bits.
+  int32 default_second_azimuth = 5;  // 9 bits.
+  // `default_second_azimuth` is clipped to [-180, 180].
+  int32 default_second_elevation = 6;  // 8 bits.
+  // `default_second_elevation` is clipped to [-90, 90].
+  int32 default_second_distance = 7;  // 7 bits.
+}
+
+message DualCart8ParamDefinition {
+  ParamDefinition param_definition = 1;
+  int32 default_first_x = 2;   // 8 bits.
+  int32 default_first_y = 3;   // 8 bits.
+  int32 default_first_z = 4;   // 8 bits.
+  int32 default_second_x = 5;  // 8 bits.
+  int32 default_second_y = 6;  // 8 bits.
+  int32 default_second_z = 7;  // 8 bits.
+}
+
+message DualCart16ParamDefinition {
+  ParamDefinition param_definition = 1;
+  int32 default_first_x = 2;   // 16 bits.
+  int32 default_first_y = 3;   // 16 bits.
+  int32 default_first_z = 4;   // 16 bits.
+  int32 default_second_x = 5;  // 16 bits.
+  int32 default_second_y = 6;  // 16 bits.
+  int32 default_second_z = 7;  // 16 bits.
 }
diff --git a/tests/proto/parameter_block.proto b/tests/proto/parameter_block.proto
index f85aeb28..3fb4f00e 100644
--- a/tests/proto/parameter_block.proto
+++ b/tests/proto/parameter_block.proto
@@ -8,7 +8,7 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
@@ -16,12 +16,15 @@ import "obu_header.proto";
 import "parameter_data.proto";
 
 message ParameterDataExtension {
-  optional uint32 parameter_data_size = 1;
-  optional bytes parameter_data_bytes = 2;
+  // `parameter_data_size` is ignored. The value in the bitstream is inferred
+  // based on the size of `parameter_data_bytes`.
+  uint32 parameter_data_size = 1 [deprecated = true];
+  bytes parameter_data_bytes = 2;
 }
 
 message ParameterSubblock {
-  optional uint32 subblock_duration = 1;
+  uint32 subblock_duration = 1;
+
   oneof parameter_data {
     MixGainParameterData mix_gain_parameter_data = 2;
     DemixingInfoParameterData demixing_info_parameter_data = 3;
@@ -31,11 +34,13 @@ message ParameterSubblock {
 }
 
 message ParameterBlockObuMetadata {
-  optional uint32 parameter_id = 1;
-  optional uint32 duration = 2;
-  optional uint32 num_subblocks = 3;
-  optional uint32 constant_subblock_duration = 4;
+  uint32 parameter_id = 1;
+  uint32 duration = 2;
+  // `num_subblocks` is ignored. The value in the bitstream is inferred based on
+  // the number of `subblocks`.
+  uint32 num_subblocks = 3 [deprecated = true];
+  uint32 constant_subblock_duration = 4;
   repeated ParameterSubblock subblocks = 5;
-  optional int32 start_timestamp = 6;
-  optional ObuHeaderMetadata obu_header = 7;
+  int64 start_timestamp = 6;
+  ObuHeaderMetadata obu_header = 7;
 }
diff --git a/tests/proto/parameter_data.proto b/tests/proto/parameter_data.proto
index 763ce867..b6df7007 100644
--- a/tests/proto/parameter_data.proto
+++ b/tests/proto/parameter_data.proto
@@ -8,10 +8,12 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
+option features.enum_type = CLOSED;
+
 enum AnimationType {
   ANIMATE_INVALID = 0;
   ANIMATE_STEP = 1;
@@ -19,20 +21,47 @@ enum AnimationType {
   ANIMATE_BEZIER = 3;
 }
 
+// Values are represented to align with the IAMF spec.
+//
+// See https://aomediacodec.github.io/iamf/v1.1.0.html#syntax-mix-gain-param for
+// further details.
+//
+// See detailed examples on Q7.8 format below in `AnimationLinearInt16`.
 message AnimationStepInt16 {
-  optional int32 start_point_value = 1;
+  int32 start_point_value = 1;  // Q7.8.
 }
 
+// Values are represented to align with the IAMF spec.
+//
+// See https://aomediacodec.github.io/iamf/v1.1.0.html#syntax-mix-gain-param for
+// further details.
+//
+// See detailed examples on Q7.8 format below in `AnimationLinearInt16`.
 message AnimationLinearInt16 {
-  optional int32 start_point_value = 1;
-  optional int32 end_point_value = 2;
+  int32 start_point_value = 1;  // Q7.8.
+  int32 end_point_value = 2;    // Q7.8.
 }
 
+// Values are represented to align with the IAMF spec.
+//
+// See https://aomediacodec.github.io/iamf/v1.1.0.html#syntax-mix-gain-param for
+// further details.
+//
+// To convert from dB to Q7.8, multiply by 256. Example:
+//  - For -3 dB, set the proto value to 256 * -3 = -768.
+//  - For +6 dB, set the proto value to 256 * 6 = 1536.
+//
+// To convert from a float in the range [0.0, 1.0] to Q0.8. Multiply by 256 and
+// clamp to the range [0, 255]. Examples:
+//  - For a control point relative time of 0.5, set the proto value to
+//    clam(0.5 * 256, 0, 255) = 128.
+//  - For a control point relative time of 1.0, set the proto value to
+//    clamp(1.0 * 256, 0, 255) = 255.
 message AnimationBezierInt16 {
-  optional int32 start_point_value = 1;
-  optional int32 end_point_value = 2;
-  optional int32 control_point_value = 3;
-  optional uint32 control_point_relative_time = 4;
+  int32 start_point_value = 1;             // Q7.8.
+  int32 end_point_value = 2;               // Q7.8.
+  int32 control_point_value = 3;           // Q7.8.
+  uint32 control_point_relative_time = 4;  // Q0.8.
 }
 
 message AnimatedParameterDataInt16 {
@@ -44,12 +73,13 @@ message AnimatedParameterDataInt16 {
 }
 
 message MixGainParameterData {
-  optional AnimationType animation_type = 1;
-  optional AnimatedParameterDataInt16 param_data = 2;
+  AnimationType animation_type = 1;
+  AnimatedParameterDataInt16 param_data = 2;
 }
 
 enum DMixPMode {
   DMIXP_MODE_INVALID = 0;
+
   //                       (alpha, beta,  gamma, delta, w_idx_offset)
   DMIXP_MODE_1 = 1;  //    (    1,     1, 0.707, 0.707,           -1)
   DMIXP_MODE_2 = 2;  //    (0.707, 0.707, 0.707, 0.707,           -1)
@@ -62,11 +92,13 @@ enum DMixPMode {
 }
 
 message DemixingInfoParameterData {
-  optional DMixPMode dmixp_mode = 1;
-  optional uint32 reserved = 2;
+  DMixPMode dmixp_mode = 1;
+  uint32 reserved = 2;
 }
 
 message ReconGains {
+  reserved 1;
+
   // Mapping from a bit position to a recon gain value.
   // If recon_gain[j] is defined, then the j-th bit of recon_gain_flags[i]
   // (for the i-th layer) will be set.
@@ -74,6 +106,8 @@ message ReconGains {
 }
 
 message ReconGainInfoParameterData {
+  reserved 1;
+
   // Length = `num_layers`.
   repeated ReconGains recon_gains_for_layer = 2;
 }
diff --git a/tests/proto/temporal_delimiter.proto b/tests/proto/temporal_delimiter.proto
index ab95ea5c..7ea30677 100644
--- a/tests/proto/temporal_delimiter.proto
+++ b/tests/proto/temporal_delimiter.proto
@@ -8,10 +8,10 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
 message TemporalDelimiterObuMetadata {
-  optional bool enable_temporal_delimiters = 1;
+  bool enable_temporal_delimiters = 1;
 }
diff --git a/tests/proto/test_vector_metadata.proto b/tests/proto/test_vector_metadata.proto
index 096c1abe..430ec9e6 100644
--- a/tests/proto/test_vector_metadata.proto
+++ b/tests/proto/test_vector_metadata.proto
@@ -8,41 +8,53 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
+option features.utf8_validation = NONE;
+
 enum Leb128GeneratorMode {
+  option features.enum_type = CLOSED;
+
   GENERATE_LEB_INVALID = 0;
+
   // Generate values using the minimum number of bytes.
   GENERATE_LEB_MINIMUM = 1;
+
   // Generate values using the target of bytes.
   GENERATE_LEB_FIXED_SIZE = 2;
 }
 
 message Leb128Generator {
-  optional Leb128GeneratorMode mode = 1 [default = GENERATE_LEB_MINIMUM];
+  Leb128GeneratorMode mode = 1 [default = GENERATE_LEB_MINIMUM];
+
   // Configures the target number of bytes when using `GENERATE_LEB_FIXED_SIZE`
   // mode.
-  optional int32 fixed_size = 2 [default = 5];
+  int32 fixed_size = 2 [default = 5];
 }
 
+// Metadata to describe and annotate test vectors. For historical reasons, some
+// of the fields here are used to control encoder behavior.
 message TestVectorMetadata {
-  optional string human_readable_description = 1;
+  reserved 5;
+
+  string human_readable_description = 1;
+
   // Prefix of the output file names. Leave empty to skip writing to output
   // files.
-  optional string file_name_prefix = 2;
+  string file_name_prefix = 2;
 
   // TODO(b/269708630): Rename `is_valid` to `is_valid_to_encode`.
   // `true` when all mixes are valid to encode. Mixes may be invalid if they
   // contain any mixes that use certain reserved values, or if they exercise any
   // features which are not supported by the encoder.
-  optional bool is_valid = 3;
+  bool is_valid = 3;
+
   // `true` when a compliant decoder would decode at least one valid mix. Some
   // other mixes may be invalid or use reserved values which may be ignored.
-  optional bool is_valid_to_decode = 14 [default = true];
-  optional string mp4_fixed_timestamp = 4;
-  reserved 5;
+  bool is_valid_to_decode = 14 [default = true];
+
   // Tags to identify the repository this test vector belongs to. A repository
   // could be a git branch or it could refer to some other way to organize a
   // test suite.
@@ -56,23 +68,40 @@ message TestVectorMetadata {
   //     branch of https://github.com/AOMediaCodec/libiamf
   repeated string test_repository_tags = 15;
   repeated string primary_tested_spec_sections = 6;
-  optional string base_test = 7;
-  optional int32 ms_per_fragment = 8 [default = 10000];
-  optional bool override_computed_recon_gains = 9 [default = false];
+  string base_test = 7;
+
+  // TODO(b/384960137): Migrate `mp4_fixed_timestamp`, `ms_per_fragment`,
+  //                    `override_computed_recon_gains`,
+  //                    `validate_user_loudness`,
+  //                    `partition_mix_gain_parameter_blocks`, `leb_generator`
+  //                    to `EncoderControlMetadata`.
+
+  // MP4 controls.
+  string mp4_fixed_timestamp = 4;
+  int32 ms_per_fragment = 8 [default = 10000];
+
+  // TODO(b/309461674): Deprecate and add a mode in `EncoderControlMetadata` to
+  //                    use the computed gains, without checking the
+  //                    user-provided gains.
+  // `false` to check that user-provided recon gains match the computed gains.
+  // `true` to override the computed recon gains with the user-provided gains.
+  bool override_computed_recon_gains = 9 [default = false];
 
   // Controls whether to validate the user-provided loudness against the
   // computed loudness.
-  optional bool validate_user_loudness = 13 [default = false];
+  bool validate_user_loudness = 13 [default = false];
 
-  // An override to control the output bit-depth of the output `rendered` wav
-  // file.
-  optional uint32 output_wav_file_bit_depth_override = 12;
+  // Deprecated: This field should not be set and has been superseded by
+  // `EncoderControlMetadata.output_audio_format`.
+  uint32 output_wav_file_bit_depth_override = 12 [deprecated = true];
 
   // `true` partitions the input mix gain parameter blocks to be aligned with
   // single frames. The `param_definition` in the descriptor OBUs must be
   // accurate.
-  optional bool partition_mix_gain_parameter_blocks = 10 [default = true];
+  bool partition_mix_gain_parameter_blocks = 10 [default = true];
 
   // Settings to configure how `Leb128`s are generated.
-  optional Leb128Generator leb_generator = 11;
+  Leb128Generator leb_generator = 11;
+
+  // Next ID: 16
 }
diff --git a/tests/proto/types.proto b/tests/proto/types.proto
new file mode 100644
index 00000000..3479e8c9
--- /dev/null
+++ b/tests/proto/types.proto
@@ -0,0 +1,27 @@
+
+// Copyright (c) 2026, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 3-Clause Clear License
+// and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+// License was not distributed with this source code in the LICENSE file, you
+// can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+// Alliance for Open Media Patent License 1.0 was not distributed with this
+// source code in the PATENTS file, you can obtain it at
+// www.aomedia.org/license/patent.
+
+edition = "2023";
+
+package libiamf_proto;
+
+option java_outer_classname = "Types";
+option java_multiple_files = true;
+
+// For use when it could be convenient to represent the same logical field as
+// either floating point or Q-format in different contexts.
+message QFormatOrFloatingPoint {
+  oneof value {
+    float floating_point = 1;
+    int32 q7_dot8 = 2;
+    // TODO: b/391851526 - Add Q8.0 format.
+  }
+}
diff --git a/tests/proto/user_metadata.proto b/tests/proto/user_metadata.proto
index 0dfa19f5..18133336 100644
--- a/tests/proto/user_metadata.proto
+++ b/tests/proto/user_metadata.proto
@@ -8,7 +8,7 @@
 // source code in the PATENTS file, you can obtain it at
 // www.aomedia.org/license/patent.
 
-syntax = "proto2";
+edition = "2023";
 
 package libiamf_proto;
 
@@ -16,25 +16,40 @@ import "arbitrary_obu.proto";
 import "audio_element.proto";
 import "audio_frame.proto";
 import "codec_config.proto";
+import "encoder_control_metadata.proto";
 import "ia_sequence_header.proto";
+import "metadata_obu.proto";
 import "mix_presentation.proto";
 import "parameter_block.proto";
 import "temporal_delimiter.proto";
 import "test_vector_metadata.proto";
 
 message UserMetadata {
-  reserved 1;
+  reserved 1, 5;
+
+  // Top-level metadata about the file.
+  TestVectorMetadata test_vector_metadata = 9;
+
+  // Knobs to control the encoder behavior.
+  EncoderControlMetadata encoder_control_metadata = 12;
+
+  // Descriptor OBUs.
   repeated IASequenceHeaderObuMetadata ia_sequence_header_metadata = 10;
   repeated CodecConfigObuMetadata codec_config_metadata = 2;
   repeated AudioElementObuMetadata audio_element_metadata = 3;
   repeated MixPresentationObuMetadata mix_presentation_metadata = 4;
-  reserved 5;
+
+  // Temporal Unit OBUs.
   repeated AudioFrameObuMetadata audio_frame_metadata = 6;
   repeated ParameterBlockObuMetadata parameter_block_metadata = 7;
-  optional TemporalDelimiterObuMetadata temporal_delimiter_metadata = 8;
-  optional TestVectorMetadata test_vector_metadata = 9;
+  TemporalDelimiterObuMetadata temporal_delimiter_metadata = 8;
 
   // A list of arbitrary OBUs to insert blindly into the stream. There is no
   // attempt to validate or process any side effects of adding the OBUs.
   repeated ArbitraryObuMetadata arbitrary_obu_metadata = 11;
+
+  // Metadata OBUs.
+  repeated MetadataObuMetadata metadata_obu_metadata = 13;
+
+  // Next ID: 14
 }
diff --git a/tests/test_000800.iamf b/tests/test_000800.iamf
new file mode 100644
index 00000000..da02c0a0
Binary files /dev/null and b/tests/test_000800.iamf differ
diff --git a/tests/test_000800.textproto b/tests/test_000800.textproto
new file mode 100644
index 00000000..1534aab8
--- /dev/null
+++ b/tests/test_000800.textproto
@@ -0,0 +1,212 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Objects and a PolarParameterDefinition"
+  file_name_prefix: "test_000800"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.1/rendering_config_ with param_definition_polar"
+  ]
+  base_test: "test_001016"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 0
+              duration: 1024
+              constant_subblock_duration: 1024
+            }
+            default_azimuth: 0
+            default_elevation: 0
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_12_0_1_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+arbitrary_obu_metadata {
+  # A step parameter block in front of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 0
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `STEP`.
+    "\x00"
+    # Azimuth: 0, Elevation: 0, Distance: 127.
+    "\x00\x00\x7f"
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the left of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 1024
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    # Azimuth: +90, Elevation: 0, Distance: 127.
+    "\x2d\x00\x7f"
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the rear of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 2048
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    # Azimuth: +180, Elevation: 0, Distance: 127.
+    "\x5a\x00\x7f"
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the right of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 3072
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    # Azimuth: -90, Elevation: 0, Distance: 127.
+    "\xd3\x00\x7f"
+}
+
+# Note that remaining frames exercise "parameter block gaps". They default based
+# on the parameter definition. In this case, this is to the front of the
+# listener.
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000800_f.mp4 b/tests/test_000800_f.mp4
new file mode 100644
index 00000000..2aa3f1ca
Binary files /dev/null and b/tests/test_000800_f.mp4 differ
diff --git a/tests/test_000800_s.mp4 b/tests/test_000800_s.mp4
new file mode 100644
index 00000000..ff14b895
Binary files /dev/null and b/tests/test_000800_s.mp4 differ
diff --git a/tests/test_000801.iamf b/tests/test_000801.iamf
new file mode 100644
index 00000000..1fd93581
Binary files /dev/null and b/tests/test_000801.iamf differ
diff --git a/tests/test_000801.textproto b/tests/test_000801.textproto
new file mode 100644
index 00000000..184a8124
--- /dev/null
+++ b/tests/test_000801.textproto
@@ -0,0 +1,204 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with a Cartesian 8 Object"
+  file_name_prefix: "test_000801"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with cartesian_8_param_definition"
+  ]
+  base_test: "test_000800"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 0
+              duration: 1024
+              constant_subblock_duration: 1024
+            }
+            default_x: 0
+            default_y: 127
+            default_z: 0
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+arbitrary_obu_metadata {
+  # A step parameter block in front of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 0
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `STEP`.
+    "\x00"
+    "\x00"  # x: 0
+    "\x7f"  # y: 127
+    "\x00"  # z: 0
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the left of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 1024
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    "\x81"  # x: -127
+    "\x00"  # y: 0
+    "\x00"  # z: 0
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the rear of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 2048
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    "\x00"  # x: 0
+    "\x81"  # y: -127
+    "\x00"  # z: 0
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the right of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 3072
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    "\x7f"  # x: 127
+    "\x00"  # y: 0
+    "\x00"  # z: 0
+}
+
+# Note that remaining frames exercise "parameter block gaps". They default based
+# on the parameter definition. In this case, this is to the front of the
+# listener.
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000801_f.mp4 b/tests/test_000801_f.mp4
new file mode 100644
index 00000000..b3c3b53e
Binary files /dev/null and b/tests/test_000801_f.mp4 differ
diff --git a/tests/test_000801_s.mp4 b/tests/test_000801_s.mp4
new file mode 100644
index 00000000..f4b0ff69
Binary files /dev/null and b/tests/test_000801_s.mp4 differ
diff --git a/tests/test_000802.iamf b/tests/test_000802.iamf
new file mode 100644
index 00000000..af1e616c
Binary files /dev/null and b/tests/test_000802.iamf differ
diff --git a/tests/test_000802.textproto b/tests/test_000802.textproto
new file mode 100644
index 00000000..2a3393ee
--- /dev/null
+++ b/tests/test_000802.textproto
@@ -0,0 +1,215 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with a Cartesian 16 Object"
+  file_name_prefix: "test_000802"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with cartesian_16_param_definition"
+  ]
+  base_test: "test_000800"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 0
+              duration: 1024
+              constant_subblock_duration: 1024
+            }
+            default_x: 0
+            default_y: 32767
+            default_z: 0
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_11_2_3_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+}
+
+arbitrary_obu_metadata {
+  # A step parameter block in front of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 0
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `STEP`.
+    "\x00"
+    "\x00\x00" # x: 0
+    "\x7f\xff"  # y: 32767
+    "\x00\x00"  # z: 0
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the left of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 1024
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    "\x80\x01" # x: -32767
+    "\x00\x00"  # y: 0
+    "\x00\x00"  # z: 0
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the rear of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 2048
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    "\x00\x00" # x: 0
+    "\x80\x01"  # y: -32767
+    "\x00\x00"  # z: 0
+}
+
+arbitrary_obu_metadata {
+  # An inter-linear parameter block in to the right of the listener.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 3072
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (1)`.
+    "\x01"
+    # `animation_type` = `INTER_LINEAR`.
+    "\x03"
+    "\x7f\xff" # x: 32767
+    "\x00\x00"  # y: 0
+    "\x00\x00"  # z: 0
+}
+
+# Note that remaining frames exercise "parameter block gaps". They default based
+# on the parameter definition. In this case, this is to the front of the
+# listener.
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000802_f.mp4 b/tests/test_000802_f.mp4
new file mode 100644
index 00000000..4954caa2
Binary files /dev/null and b/tests/test_000802_f.mp4 differ
diff --git a/tests/test_000802_s.mp4 b/tests/test_000802_s.mp4
new file mode 100644
index 00000000..f1cbbcd8
Binary files /dev/null and b/tests/test_000802_s.mp4 differ
diff --git a/tests/test_000803.iamf b/tests/test_000803.iamf
new file mode 100644
index 00000000..3d5deaf6
Binary files /dev/null and b/tests/test_000803.iamf differ
diff --git a/tests/test_000803.textproto b/tests/test_000803.textproto
new file mode 100644
index 00000000..a7a3b694
--- /dev/null
+++ b/tests/test_000803.textproto
@@ -0,0 +1,1017 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Objects and a PolarParameterDefinition"
+  file_name_prefix: "test_000803"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.1/rendering_config_ with param_definition_polar"
+  ]
+  base_test: "test_000800"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [3]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [4]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [5]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 306
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [6]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 307
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [7]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 308
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [8]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 309
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [9]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 310
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [10]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 311
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [11]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 312
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [12]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 313
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [13]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 314
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [14]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 315
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [15]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 316
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 317
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [17]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 104
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 105
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 5
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 106
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 6
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 107
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 306
+      localized_element_annotations: ["test_sub_mix_0_audio_element_6"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 7
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 108
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 307
+      localized_element_annotations: ["test_sub_mix_0_audio_element_7"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 8
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 109
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 308
+      localized_element_annotations: ["test_sub_mix_0_audio_element_8"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 9
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 110
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 309
+      localized_element_annotations: ["test_sub_mix_0_audio_element_9"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 10
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 111
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 310
+      localized_element_annotations: ["test_sub_mix_0_audio_element_10"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 11
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 112
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 311
+      localized_element_annotations: ["test_sub_mix_0_audio_element_11"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 12
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 113
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 312
+      localized_element_annotations: ["test_sub_mix_0_audio_element_12"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 13
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 114
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 313
+      localized_element_annotations: ["test_sub_mix_0_audio_element_13"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 14
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 115
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 314
+      localized_element_annotations: ["test_sub_mix_0_audio_element_14"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 15
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 116
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 315
+      localized_element_annotations: ["test_sub_mix_0_audio_element_15"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 16
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 117
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 316
+      localized_element_annotations: ["test_sub_mix_0_audio_element_16"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 17
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 118
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 317
+      localized_element_annotations: ["test_sub_mix_0_audio_element_17"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 18
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 119
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_B_0_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 306
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 307
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 308
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 309
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 310
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 311
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 312
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 313
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 314
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 315
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 316
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 317
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000803_f.mp4 b/tests/test_000803_f.mp4
new file mode 100644
index 00000000..3f4ee109
Binary files /dev/null and b/tests/test_000803_f.mp4 differ
diff --git a/tests/test_000803_s.mp4 b/tests/test_000803_s.mp4
new file mode 100644
index 00000000..80e68f0f
Binary files /dev/null and b/tests/test_000803_s.mp4 differ
diff --git a/tests/test_000804.iamf b/tests/test_000804.iamf
new file mode 100644
index 00000000..f28f1a10
Binary files /dev/null and b/tests/test_000804.iamf differ
diff --git a/tests/test_000804.textproto b/tests/test_000804.textproto
new file mode 100644
index 00000000..ac022cd2
--- /dev/null
+++ b/tests/test_000804.textproto
@@ -0,0 +1,1017 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with a Cartesian 8 Object"
+  file_name_prefix: "test_000804"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with cartesian_8_param_definition"
+  ]
+  base_test: "test_000801"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [3]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [4]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [5]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 306
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [6]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 307
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [7]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 308
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [8]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 309
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [9]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 310
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [10]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 311
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [11]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 312
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [12]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 313
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [13]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 314
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [14]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 315
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [15]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 316
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 317
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [17]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 104
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 105
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 5
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 106
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 6
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 107
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 306
+      localized_element_annotations: ["test_sub_mix_0_audio_element_6"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 7
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 108
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 307
+      localized_element_annotations: ["test_sub_mix_0_audio_element_7"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 8
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 109
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 308
+      localized_element_annotations: ["test_sub_mix_0_audio_element_8"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 9
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 110
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 309
+      localized_element_annotations: ["test_sub_mix_0_audio_element_9"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 10
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 111
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 310
+      localized_element_annotations: ["test_sub_mix_0_audio_element_10"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 11
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 112
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 311
+      localized_element_annotations: ["test_sub_mix_0_audio_element_11"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 12
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 113
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 312
+      localized_element_annotations: ["test_sub_mix_0_audio_element_12"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 13
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 114
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 313
+      localized_element_annotations: ["test_sub_mix_0_audio_element_13"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 14
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 115
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 314
+      localized_element_annotations: ["test_sub_mix_0_audio_element_14"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 15
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 116
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 315
+      localized_element_annotations: ["test_sub_mix_0_audio_element_15"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 16
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 117
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 316
+      localized_element_annotations: ["test_sub_mix_0_audio_element_16"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 17
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 118
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 317
+      localized_element_annotations: ["test_sub_mix_0_audio_element_17"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 18
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 119
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_C_2_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 306
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 307
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 308
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 309
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 310
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 311
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 312
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 313
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 314
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 315
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 316
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 317
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000804_f.mp4 b/tests/test_000804_f.mp4
new file mode 100644
index 00000000..54adde50
Binary files /dev/null and b/tests/test_000804_f.mp4 differ
diff --git a/tests/test_000804_s.mp4 b/tests/test_000804_s.mp4
new file mode 100644
index 00000000..30c726a7
Binary files /dev/null and b/tests/test_000804_s.mp4 differ
diff --git a/tests/test_000805.iamf b/tests/test_000805.iamf
new file mode 100644
index 00000000..5eb07ba6
Binary files /dev/null and b/tests/test_000805.iamf differ
diff --git a/tests/test_000805.textproto b/tests/test_000805.textproto
new file mode 100644
index 00000000..6459fb3d
--- /dev/null
+++ b/tests/test_000805.textproto
@@ -0,0 +1,1017 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with a Cartesian 16 Object"
+  file_name_prefix: "test_000805"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with cartesian_16_param_definition"
+  ]
+  base_test: "test_000802"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [3]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [4]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [5]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 306
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [6]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 307
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [7]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 308
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [8]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 309
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [9]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 310
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [10]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 311
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [11]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 312
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [12]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 313
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [13]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 314
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [14]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 315
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [15]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 316
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 317
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [17]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 104
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 105
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 5
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 106
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 6
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 107
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 306
+      localized_element_annotations: ["test_sub_mix_0_audio_element_6"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 7
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 108
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 307
+      localized_element_annotations: ["test_sub_mix_0_audio_element_7"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 8
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 109
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 308
+      localized_element_annotations: ["test_sub_mix_0_audio_element_8"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 9
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 110
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 309
+      localized_element_annotations: ["test_sub_mix_0_audio_element_9"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 10
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 111
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 310
+      localized_element_annotations: ["test_sub_mix_0_audio_element_10"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 11
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 112
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 311
+      localized_element_annotations: ["test_sub_mix_0_audio_element_11"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 12
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 113
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 312
+      localized_element_annotations: ["test_sub_mix_0_audio_element_12"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 13
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 114
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 313
+      localized_element_annotations: ["test_sub_mix_0_audio_element_13"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 14
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 115
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 314
+      localized_element_annotations: ["test_sub_mix_0_audio_element_14"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 15
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 116
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 315
+      localized_element_annotations: ["test_sub_mix_0_audio_element_15"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 16
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 117
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 316
+      localized_element_annotations: ["test_sub_mix_0_audio_element_16"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 17
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 118
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 317
+      localized_element_annotations: ["test_sub_mix_0_audio_element_17"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 18
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 119
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 306
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 307
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 308
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 309
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 310
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 311
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 312
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 313
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 314
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 315
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 316
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 317
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000805_f.mp4 b/tests/test_000805_f.mp4
new file mode 100644
index 00000000..0caf3bde
Binary files /dev/null and b/tests/test_000805_f.mp4 differ
diff --git a/tests/test_000805_s.mp4 b/tests/test_000805_s.mp4
new file mode 100644
index 00000000..3ef3fdec
Binary files /dev/null and b/tests/test_000805_s.mp4 differ
diff --git a/tests/test_000806.iamf b/tests/test_000806.iamf
new file mode 100644
index 00000000..b989ac10
Binary files /dev/null and b/tests/test_000806.iamf differ
diff --git a/tests/test_000806.textproto b/tests/test_000806.textproto
new file mode 100644
index 00000000..2c16a6da
--- /dev/null
+++ b/tests/test_000806.textproto
@@ -0,0 +1,154 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Dual Polar Object"
+  file_name_prefix: "test_000806"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config with two objects",
+    "3.7.2.2/rendering_config with dual_polar_param_definition"
+  ]
+  base_test: "test_001016"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_I_0_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000806_f.mp4 b/tests/test_000806_f.mp4
new file mode 100644
index 00000000..22bb9fd4
Binary files /dev/null and b/tests/test_000806_f.mp4 differ
diff --git a/tests/test_000806_s.mp4 b/tests/test_000806_s.mp4
new file mode 100644
index 00000000..82cac8ad
Binary files /dev/null and b/tests/test_000806_s.mp4 differ
diff --git a/tests/test_000807.iamf b/tests/test_000807.iamf
new file mode 100644
index 00000000..c226ec7f
Binary files /dev/null and b/tests/test_000807.iamf differ
diff --git a/tests/test_000807.textproto b/tests/test_000807.textproto
new file mode 100644
index 00000000..5964e6ca
--- /dev/null
+++ b/tests/test_000807.textproto
@@ -0,0 +1,154 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Dual Cartesian 8 Object"
+  file_name_prefix: "test_000807"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config with two objects",
+    "3.7.3.3/rendering_config with dual_caretsian_8_param_definition"
+  ]
+  base_test: "test_001016"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_10_2_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000807_f.mp4 b/tests/test_000807_f.mp4
new file mode 100644
index 00000000..4f6fc449
Binary files /dev/null and b/tests/test_000807_f.mp4 differ
diff --git a/tests/test_000807_s.mp4 b/tests/test_000807_s.mp4
new file mode 100644
index 00000000..945abe1e
Binary files /dev/null and b/tests/test_000807_s.mp4 differ
diff --git a/tests/test_000808.iamf b/tests/test_000808.iamf
new file mode 100644
index 00000000..90c529f2
Binary files /dev/null and b/tests/test_000808.iamf differ
diff --git a/tests/test_000808.textproto b/tests/test_000808.textproto
new file mode 100644
index 00000000..d6a04c39
--- /dev/null
+++ b/tests/test_000808.textproto
@@ -0,0 +1,154 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Dual Cartesian 16 Object"
+  file_name_prefix: "test_000808"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config with two objects",
+    "3.7.3.4/rendering_config with dual_cartesian_16_param_definition"
+  ]
+  base_test: "test_001016"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000808_f.mp4 b/tests/test_000808_f.mp4
new file mode 100644
index 00000000..8b9a7c2c
Binary files /dev/null and b/tests/test_000808_f.mp4 differ
diff --git a/tests/test_000808_s.mp4 b/tests/test_000808_s.mp4
new file mode 100644
index 00000000..9efd2782
Binary files /dev/null and b/tests/test_000808_s.mp4 differ
diff --git a/tests/test_000809.iamf b/tests/test_000809.iamf
new file mode 100644
index 00000000..90fb6fb2
Binary files /dev/null and b/tests/test_000809.iamf differ
diff --git a/tests/test_000809.textproto b/tests/test_000809.textproto
new file mode 100644
index 00000000..56e4ae38
--- /dev/null
+++ b/tests/test_000809.textproto
@@ -0,0 +1,594 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Many Dual Polar Objects"
+  file_name_prefix: "test_000809"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config_ with dual param_definition_polar"
+  ]
+  base_test: "test_000803"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [3]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [4]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [5]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 306
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [6]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 307
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [7]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+
+audio_element_metadata {
+  audio_element_id: 308
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [8]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 104
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 105
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 5
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 106
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 6
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 107
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 306
+      localized_element_annotations: ["test_sub_mix_0_audio_element_6"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 7
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 108
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 307
+      localized_element_annotations: ["test_sub_mix_0_audio_element_7"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 8
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 109
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+    audio_elements {
+      audio_element_id: 308
+      localized_element_annotations: ["test_sub_mix_0_audio_element_8"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 9
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 110
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_13_6_9_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 306
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 307
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 308
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000809_f.mp4 b/tests/test_000809_f.mp4
new file mode 100644
index 00000000..488d7940
Binary files /dev/null and b/tests/test_000809_f.mp4 differ
diff --git a/tests/test_000809_s.mp4 b/tests/test_000809_s.mp4
new file mode 100644
index 00000000..c6459125
Binary files /dev/null and b/tests/test_000809_s.mp4 differ
diff --git a/tests/test_000810.iamf b/tests/test_000810.iamf
new file mode 100644
index 00000000..404ca8e2
Binary files /dev/null and b/tests/test_000810.iamf differ
diff --git a/tests/test_000810.textproto b/tests/test_000810.textproto
new file mode 100644
index 00000000..00271708
--- /dev/null
+++ b/tests/test_000810.textproto
@@ -0,0 +1,594 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Many Dual Cart8 Objects"
+  file_name_prefix: "test_000810"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.3/rendering_config_ with dual param_definition_polar"
+  ]
+  base_test: "test_000803"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [3]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [4]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [5]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 306
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [6]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 307
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [7]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 308
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [8]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 104
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 105
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 5
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 106
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 6
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 107
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 306
+      localized_element_annotations: ["test_sub_mix_0_audio_element_6"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 7
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 108
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 307
+      localized_element_annotations: ["test_sub_mix_0_audio_element_7"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 8
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 109
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 308
+      localized_element_annotations: ["test_sub_mix_0_audio_element_8"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 8
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 109
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 306
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 307
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 308
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000810_f.mp4 b/tests/test_000810_f.mp4
new file mode 100644
index 00000000..34a7e753
Binary files /dev/null and b/tests/test_000810_f.mp4 differ
diff --git a/tests/test_000810_s.mp4 b/tests/test_000810_s.mp4
new file mode 100644
index 00000000..856492c0
Binary files /dev/null and b/tests/test_000810_s.mp4 differ
diff --git a/tests/test_000811.iamf b/tests/test_000811.iamf
new file mode 100644
index 00000000..9dcc3355
Binary files /dev/null and b/tests/test_000811.iamf differ
diff --git a/tests/test_000811.textproto b/tests/test_000811.textproto
new file mode 100644
index 00000000..d42294b9
--- /dev/null
+++ b/tests/test_000811.textproto
@@ -0,0 +1,594 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Many Dual Cart16 Objects"
+  file_name_prefix: "test_000811"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.3/rendering_config_ with dual param_definition_polar"
+  ]
+  base_test: "test_000810"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [3]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [4]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [5]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 306
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [6]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 307
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [7]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 308
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [8]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 104
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 105
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 5
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 106
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 6
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 107
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 306
+      localized_element_annotations: ["test_sub_mix_0_audio_element_6"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 7
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 108
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 307
+      localized_element_annotations: ["test_sub_mix_0_audio_element_7"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 8
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 109
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 308
+      localized_element_annotations: ["test_sub_mix_0_audio_element_8"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 9
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 110
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_H_9_10_3
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 306
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 307
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 308
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000811_f.mp4 b/tests/test_000811_f.mp4
new file mode 100644
index 00000000..b7587dad
Binary files /dev/null and b/tests/test_000811_f.mp4 differ
diff --git a/tests/test_000811_s.mp4 b/tests/test_000811_s.mp4
new file mode 100644
index 00000000..05a7572b
Binary files /dev/null and b/tests/test_000811_s.mp4 differ
diff --git a/tests/test_000812.iamf b/tests/test_000812.iamf
new file mode 100644
index 00000000..ca54fcb7
Binary files /dev/null and b/tests/test_000812.iamf differ
diff --git a/tests/test_000812.textproto b/tests/test_000812.textproto
new file mode 100644
index 00000000..d55d4538
--- /dev/null
+++ b/tests/test_000812.textproto
@@ -0,0 +1,200 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with a Mono Polar and Mono Cartesian 8 Object"
+  file_name_prefix: "test_000812"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config with polar_param_definition",
+    "3.7.3.1/rendering_config with cartesian_8_param_definition"
+  ]
+  base_test: "test_000802"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 30
+            default_elevation: 45
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 127
+            default_y: 0
+            default_z: 0
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000812_f.mp4 b/tests/test_000812_f.mp4
new file mode 100644
index 00000000..c246e7e3
Binary files /dev/null and b/tests/test_000812_f.mp4 differ
diff --git a/tests/test_000812_rendered_binaural.wav b/tests/test_000812_rendered_binaural.wav
new file mode 100644
index 00000000..9fa81ae4
Binary files /dev/null and b/tests/test_000812_rendered_binaural.wav differ
diff --git a/tests/test_000812_s.mp4 b/tests/test_000812_s.mp4
new file mode 100644
index 00000000..fdcd25bc
Binary files /dev/null and b/tests/test_000812_s.mp4 differ
diff --git a/tests/test_000813.iamf b/tests/test_000813.iamf
new file mode 100644
index 00000000..9ba90d0f
Binary files /dev/null and b/tests/test_000813.iamf differ
diff --git a/tests/test_000813.textproto b/tests/test_000813.textproto
new file mode 100644
index 00000000..c77e04e9
--- /dev/null
+++ b/tests/test_000813.textproto
@@ -0,0 +1,201 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with a Mono Polar and Mono Cartesian 16 Object"
+  file_name_prefix: "test_000813"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.3.1/rendering_config_ with cartesian_16_param_definition"
+  ]
+  base_test: "test_000802"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_12_0_1_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000813_f.mp4 b/tests/test_000813_f.mp4
new file mode 100644
index 00000000..9055876d
Binary files /dev/null and b/tests/test_000813_f.mp4 differ
diff --git a/tests/test_000813_s.mp4 b/tests/test_000813_s.mp4
new file mode 100644
index 00000000..0eae6806
Binary files /dev/null and b/tests/test_000813_s.mp4 differ
diff --git a/tests/test_000814.iamf b/tests/test_000814.iamf
new file mode 100644
index 00000000..310f63db
Binary files /dev/null and b/tests/test_000814.iamf differ
diff --git a/tests/test_000814.textproto b/tests/test_000814.textproto
new file mode 100644
index 00000000..39f0d68d
--- /dev/null
+++ b/tests/test_000814.textproto
@@ -0,0 +1,188 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with a Mono Cartesian 8 and Mono Cartesian 16 Object"
+  file_name_prefix: "test_000814"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with cartesian_8_param_definition",
+    "3.7.3.2/rendering_config_ with cartesian_16_param_definition"
+  ]
+  base_test: "test_000813"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000814_f.mp4 b/tests/test_000814_f.mp4
new file mode 100644
index 00000000..629647bd
Binary files /dev/null and b/tests/test_000814_f.mp4 differ
diff --git a/tests/test_000814_s.mp4 b/tests/test_000814_s.mp4
new file mode 100644
index 00000000..81a52c83
Binary files /dev/null and b/tests/test_000814_s.mp4 differ
diff --git a/tests/test_000815.iamf b/tests/test_000815.iamf
new file mode 100644
index 00000000..c9978a41
Binary files /dev/null and b/tests/test_000815.iamf differ
diff --git a/tests/test_000815.textproto b/tests/test_000815.textproto
new file mode 100644
index 00000000..8494f6e9
--- /dev/null
+++ b/tests/test_000815.textproto
@@ -0,0 +1,209 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Dual Polar and Dual Cartesian 8 Objects"
+  file_name_prefix: "test_000815"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.3.1/rendering_config_ with cartesian_8_param_definition"
+  ]
+  base_test: "test_000802"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_11_2_3_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000815_f.mp4 b/tests/test_000815_f.mp4
new file mode 100644
index 00000000..e628af2e
Binary files /dev/null and b/tests/test_000815_f.mp4 differ
diff --git a/tests/test_000815_s.mp4 b/tests/test_000815_s.mp4
new file mode 100644
index 00000000..d35b1bb4
Binary files /dev/null and b/tests/test_000815_s.mp4 differ
diff --git a/tests/test_000816.iamf b/tests/test_000816.iamf
new file mode 100644
index 00000000..fd38a7f7
Binary files /dev/null and b/tests/test_000816.iamf differ
diff --git a/tests/test_000816.textproto b/tests/test_000816.textproto
new file mode 100644
index 00000000..0eac5887
--- /dev/null
+++ b/tests/test_000816.textproto
@@ -0,0 +1,209 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Dual Polar and Dual Cartesian 16 Objects"
+  file_name_prefix: "test_000816"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.3.2/rendering_config_ with cartesian_16_param_definition"
+  ]
+  base_test: "test_000815"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_B_0_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000816_f.mp4 b/tests/test_000816_f.mp4
new file mode 100644
index 00000000..938d75a4
Binary files /dev/null and b/tests/test_000816_f.mp4 differ
diff --git a/tests/test_000816_s.mp4 b/tests/test_000816_s.mp4
new file mode 100644
index 00000000..bc8692ca
Binary files /dev/null and b/tests/test_000816_s.mp4 differ
diff --git a/tests/test_000817.iamf b/tests/test_000817.iamf
new file mode 100644
index 00000000..1dbfd7b0
Binary files /dev/null and b/tests/test_000817.iamf differ
diff --git a/tests/test_000817.textproto b/tests/test_000817.textproto
new file mode 100644
index 00000000..4c16c19d
--- /dev/null
+++ b/tests/test_000817.textproto
@@ -0,0 +1,209 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Dual Cartesian 8 and Dual Cartesian 16 Objects"
+  file_name_prefix: "test_000817"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with dual_cart8_param_definition",
+    "3.7.3.2/rendering_config_ with dual_cart16_param_definition"
+  ]
+  base_test: "test_000815"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_C_2_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000817_f.mp4 b/tests/test_000817_f.mp4
new file mode 100644
index 00000000..2993446f
Binary files /dev/null and b/tests/test_000817_f.mp4 differ
diff --git a/tests/test_000817_s.mp4 b/tests/test_000817_s.mp4
new file mode 100644
index 00000000..0e47ba03
Binary files /dev/null and b/tests/test_000817_s.mp4 differ
diff --git a/tests/test_000818.iamf b/tests/test_000818.iamf
new file mode 100644
index 00000000..4ae90246
Binary files /dev/null and b/tests/test_000818.iamf differ
diff --git a/tests/test_000818.textproto b/tests/test_000818.textproto
new file mode 100644
index 00000000..207c1de5
--- /dev/null
+++ b/tests/test_000818.textproto
@@ -0,0 +1,205 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Polar and Dual Polar Objects"
+  file_name_prefix: "test_000818"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000815"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000818_f.mp4 b/tests/test_000818_f.mp4
new file mode 100644
index 00000000..e3250e45
Binary files /dev/null and b/tests/test_000818_f.mp4 differ
diff --git a/tests/test_000818_s.mp4 b/tests/test_000818_s.mp4
new file mode 100644
index 00000000..36c80268
Binary files /dev/null and b/tests/test_000818_s.mp4 differ
diff --git a/tests/test_000819.iamf b/tests/test_000819.iamf
new file mode 100644
index 00000000..622a06d1
Binary files /dev/null and b/tests/test_000819.iamf differ
diff --git a/tests/test_000819.textproto b/tests/test_000819.textproto
new file mode 100644
index 00000000..c6e136ae
--- /dev/null
+++ b/tests/test_000819.textproto
@@ -0,0 +1,205 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Polar and Dual Cart8 Objects"
+  file_name_prefix: "test_000819"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.3.2/rendering_config_ with dual_cart8_param_definition"
+  ]
+  base_test: "test_000818"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_I_0_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000819_f.mp4 b/tests/test_000819_f.mp4
new file mode 100644
index 00000000..ca86cbf7
Binary files /dev/null and b/tests/test_000819_f.mp4 differ
diff --git a/tests/test_000819_s.mp4 b/tests/test_000819_s.mp4
new file mode 100644
index 00000000..6d976e79
Binary files /dev/null and b/tests/test_000819_s.mp4 differ
diff --git a/tests/test_000820.iamf b/tests/test_000820.iamf
new file mode 100644
index 00000000..c9872791
Binary files /dev/null and b/tests/test_000820.iamf differ
diff --git a/tests/test_000820.textproto b/tests/test_000820.textproto
new file mode 100644
index 00000000..afe98237
--- /dev/null
+++ b/tests/test_000820.textproto
@@ -0,0 +1,205 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Polar and Dual Cart16 Objects"
+  file_name_prefix: "test_000820"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.3.4/rendering_config_ with dual_cart16_param_definition"
+  ]
+  base_test: "test_000819"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_10_2_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000820_f.mp4 b/tests/test_000820_f.mp4
new file mode 100644
index 00000000..1e65cc62
Binary files /dev/null and b/tests/test_000820_f.mp4 differ
diff --git a/tests/test_000820_s.mp4 b/tests/test_000820_s.mp4
new file mode 100644
index 00000000..9654b4a0
Binary files /dev/null and b/tests/test_000820_s.mp4 differ
diff --git a/tests/test_000821.iamf b/tests/test_000821.iamf
new file mode 100644
index 00000000..1777d53b
Binary files /dev/null and b/tests/test_000821.iamf differ
diff --git a/tests/test_000821.textproto b/tests/test_000821.textproto
new file mode 100644
index 00000000..093dfede
--- /dev/null
+++ b/tests/test_000821.textproto
@@ -0,0 +1,205 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Cart8 and Dual Polar Objects"
+  file_name_prefix: "test_000821"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with cart8_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000815"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000821_f.mp4 b/tests/test_000821_f.mp4
new file mode 100644
index 00000000..7acc3dc5
Binary files /dev/null and b/tests/test_000821_f.mp4 differ
diff --git a/tests/test_000821_s.mp4 b/tests/test_000821_s.mp4
new file mode 100644
index 00000000..88b6db1d
Binary files /dev/null and b/tests/test_000821_s.mp4 differ
diff --git a/tests/test_000822.iamf b/tests/test_000822.iamf
new file mode 100644
index 00000000..4bb9befa
Binary files /dev/null and b/tests/test_000822.iamf differ
diff --git a/tests/test_000822.textproto b/tests/test_000822.textproto
new file mode 100644
index 00000000..ed198ba2
--- /dev/null
+++ b/tests/test_000822.textproto
@@ -0,0 +1,205 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Cart8 and Dual Cart8 Objects"
+  file_name_prefix: "test_000822"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with cart8_param_definition",
+    "3.7.3.2/rendering_config_ with dual_cart8_param_definition"
+  ]
+  base_test: "test_000821"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_13_6_9_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000822_f.mp4 b/tests/test_000822_f.mp4
new file mode 100644
index 00000000..ee5185f5
Binary files /dev/null and b/tests/test_000822_f.mp4 differ
diff --git a/tests/test_000822_s.mp4 b/tests/test_000822_s.mp4
new file mode 100644
index 00000000..80b9c035
Binary files /dev/null and b/tests/test_000822_s.mp4 differ
diff --git a/tests/test_000823.iamf b/tests/test_000823.iamf
new file mode 100644
index 00000000..cfe59bdd
Binary files /dev/null and b/tests/test_000823.iamf differ
diff --git a/tests/test_000823.textproto b/tests/test_000823.textproto
new file mode 100644
index 00000000..40fa0047
--- /dev/null
+++ b/tests/test_000823.textproto
@@ -0,0 +1,205 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Cart8 and Dual Cart16 Objects"
+  file_name_prefix: "test_000823"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.1/rendering_config_ with cart8_param_definition",
+    "3.7.3.4/rendering_config_ with dual_cart16_param_definition"
+  ]
+  base_test: "test_000822"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_8
+          cart8_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: 1
+            default_first_y: 2
+            default_first_z: 3
+            default_second_x: 4
+            default_second_y: 5
+            default_second_z: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000823_f.mp4 b/tests/test_000823_f.mp4
new file mode 100644
index 00000000..562326c3
Binary files /dev/null and b/tests/test_000823_f.mp4 differ
diff --git a/tests/test_000823_s.mp4 b/tests/test_000823_s.mp4
new file mode 100644
index 00000000..f43a794d
Binary files /dev/null and b/tests/test_000823_s.mp4 differ
diff --git a/tests/test_000824.iamf b/tests/test_000824.iamf
new file mode 100644
index 00000000..2fa226ac
Binary files /dev/null and b/tests/test_000824.iamf differ
diff --git a/tests/test_000824.textproto b/tests/test_000824.textproto
new file mode 100644
index 00000000..d5264f40
--- /dev/null
+++ b/tests/test_000824.textproto
@@ -0,0 +1,205 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Cart16 and Dual Polar Objects"
+  file_name_prefix: "test_000824"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.2/rendering_config_ with cart16_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000821"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 1
+            default_y: 2
+            default_z: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 3
+            default_second_azimuth: 4
+            default_second_elevation: 5
+            default_second_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_H_9_10_3
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000824_f.mp4 b/tests/test_000824_f.mp4
new file mode 100644
index 00000000..678bea0a
Binary files /dev/null and b/tests/test_000824_f.mp4 differ
diff --git a/tests/test_000824_s.mp4 b/tests/test_000824_s.mp4
new file mode 100644
index 00000000..16dd23bb
Binary files /dev/null and b/tests/test_000824_s.mp4 differ
diff --git a/tests/test_000825.iamf b/tests/test_000825.iamf
new file mode 100644
index 00000000..c2cd4deb
Binary files /dev/null and b/tests/test_000825.iamf differ
diff --git a/tests/test_000825.textproto b/tests/test_000825.textproto
new file mode 100644
index 00000000..122be028
--- /dev/null
+++ b/tests/test_000825.textproto
@@ -0,0 +1,204 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Cart16 and Dual Cart8 Objects"
+  file_name_prefix: "test_000825"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.2/rendering_config with cart16_param_definition",
+    "3.7.3.3/rendering_config with dual_cart8_param_definition"
+  ]
+  base_test: "test_000824"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 32767
+            default_y: 0
+            default_z: 0
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_8
+          dual_cart8_param_definition:  {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: -127
+            default_first_y: 0
+            default_first_z: 0
+            default_second_x: 0
+            default_second_y: 127
+            default_second_z: 0
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000825_f.mp4 b/tests/test_000825_f.mp4
new file mode 100644
index 00000000..c4cdf04c
Binary files /dev/null and b/tests/test_000825_f.mp4 differ
diff --git a/tests/test_000825_rendered_binaural.wav b/tests/test_000825_rendered_binaural.wav
new file mode 100644
index 00000000..516d9be6
Binary files /dev/null and b/tests/test_000825_rendered_binaural.wav differ
diff --git a/tests/test_000825_s.mp4 b/tests/test_000825_s.mp4
new file mode 100644
index 00000000..f25e2a01
Binary files /dev/null and b/tests/test_000825_s.mp4 differ
diff --git a/tests/test_000826.iamf b/tests/test_000826.iamf
new file mode 100644
index 00000000..2de03bc9
Binary files /dev/null and b/tests/test_000826.iamf differ
diff --git a/tests/test_000826.textproto b/tests/test_000826.textproto
new file mode 100644
index 00000000..c49e2181
--- /dev/null
+++ b/tests/test_000826.textproto
@@ -0,0 +1,204 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream with Mono Cart16 and Dual Cart16 Objects"
+  file_name_prefix: "test_000826"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.3.2/rendering_config with cart16_param_definition",
+    "3.7.3.4/rendering_config with dual_cart16_param_definition"
+  ]
+  base_test: "test_000824"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_CART_16
+          cart16_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_x: 32767
+            default_y: 0
+            default_z: 0
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_CART_16
+          dual_cart16_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_x: -32767
+            default_first_y: 0
+            default_first_z: 0
+            default_second_x: 0
+            default_second_y: -32767
+            default_second_z: 0
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000826_f.mp4 b/tests/test_000826_f.mp4
new file mode 100644
index 00000000..3a0172e7
Binary files /dev/null and b/tests/test_000826_f.mp4 differ
diff --git a/tests/test_000826_rendered_binaural.wav b/tests/test_000826_rendered_binaural.wav
new file mode 100644
index 00000000..b56c1be4
Binary files /dev/null and b/tests/test_000826_rendered_binaural.wav differ
diff --git a/tests/test_000826_s.mp4 b/tests/test_000826_s.mp4
new file mode 100644
index 00000000..2e01518e
Binary files /dev/null and b/tests/test_000826_s.mp4 differ
diff --git a/tests/test_000827.iamf b/tests/test_000827.iamf
new file mode 100644
index 00000000..efc229bc
Binary files /dev/null and b/tests/test_000827.iamf differ
diff --git a/tests/test_000827.textproto b/tests/test_000827.textproto
new file mode 100644
index 00000000..1c731411
--- /dev/null
+++ b/tests/test_000827.textproto
@@ -0,0 +1,170 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a 7.1.5.4ch Expanded "
+    "Layout."
+  file_name_prefix: "test_000827"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 7.1.5.4ch"
+  ]
+  base_test: "test_001016"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 10
+        coupled_substream_count: 7
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_7_1_5_4_CH
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -79
+        digital_peak: -80
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3023
+        digital_peak: -5392
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000827_f.mp4 b/tests/test_000827_f.mp4
new file mode 100644
index 00000000..2eafcb0c
Binary files /dev/null and b/tests/test_000827_f.mp4 differ
diff --git a/tests/test_000827_s.mp4 b/tests/test_000827_s.mp4
new file mode 100644
index 00000000..2a0bd6fe
Binary files /dev/null and b/tests/test_000827_s.mp4 differ
diff --git a/tests/test_000828.iamf b/tests/test_000828.iamf
new file mode 100644
index 00000000..269115e5
Binary files /dev/null and b/tests/test_000828.iamf differ
diff --git a/tests/test_000828.textproto b/tests/test_000828.textproto
new file mode 100644
index 00000000..a1388a8a
--- /dev/null
+++ b/tests/test_000828.textproto
@@ -0,0 +1,153 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using an LFE-Pair Expanded Layout."
+  file_name_prefix: "test_000828"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == LFE-Pair"
+  ]
+  base_test: "test_000827"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_LFE_PAIR
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -32768
+        digital_peak: -32768
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_H_9_10_3
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -32768
+        digital_peak: -5392
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_LFE2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000828_f.mp4 b/tests/test_000828_f.mp4
new file mode 100644
index 00000000..b930032f
Binary files /dev/null and b/tests/test_000828_f.mp4 differ
diff --git a/tests/test_000828_s.mp4 b/tests/test_000828_s.mp4
new file mode 100644
index 00000000..ee2fe54a
Binary files /dev/null and b/tests/test_000828_s.mp4 differ
diff --git a/tests/test_000829.iamf b/tests/test_000829.iamf
new file mode 100644
index 00000000..a73a24a4
Binary files /dev/null and b/tests/test_000829.iamf differ
diff --git a/tests/test_000829.textproto b/tests/test_000829.textproto
new file mode 100644
index 00000000..10b2f857
--- /dev/null
+++ b/tests/test_000829.textproto
@@ -0,0 +1,156 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Bottom-3ch Expanded "
+    "Layout."
+  file_name_prefix: "test_000829"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Bottom-3ch"
+  ]
+  base_test: "test_000827"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_3_CH
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4201
+        digital_peak: -4203
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_10_2_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4939
+        digital_peak: -5392
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000829_f.mp4 b/tests/test_000829_f.mp4
new file mode 100644
index 00000000..75c81745
Binary files /dev/null and b/tests/test_000829_f.mp4 differ
diff --git a/tests/test_000829_s.mp4 b/tests/test_000829_s.mp4
new file mode 100644
index 00000000..a50ac8de
Binary files /dev/null and b/tests/test_000829_s.mp4 differ
diff --git a/tests/test_000830.iamf b/tests/test_000830.iamf
new file mode 100644
index 00000000..8bbd4acc
Binary files /dev/null and b/tests/test_000830.iamf differ
diff --git a/tests/test_000830.textproto b/tests/test_000830.textproto
new file mode 100644
index 00000000..44f101c8
--- /dev/null
+++ b/tests/test_000830.textproto
@@ -0,0 +1,157 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Bottom-4ch Expanded "
+    "Layout."
+  file_name_prefix: "test_000830"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Bottom-4ch"
+  ]
+  base_test: "test_000827"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_4_CH
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3078
+        digital_peak: -3080
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4619
+        digital_peak: -5392
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000830_f.mp4 b/tests/test_000830_f.mp4
new file mode 100644
index 00000000..fe9e8a3e
Binary files /dev/null and b/tests/test_000830_f.mp4 differ
diff --git a/tests/test_000830_s.mp4 b/tests/test_000830_s.mp4
new file mode 100644
index 00000000..9a495734
Binary files /dev/null and b/tests/test_000830_s.mp4 differ
diff --git a/tests/test_000831.iamf b/tests/test_000831.iamf
new file mode 100644
index 00000000..00f4f265
Binary files /dev/null and b/tests/test_000831.iamf differ
diff --git a/tests/test_000831.textproto b/tests/test_000831.textproto
new file mode 100644
index 00000000..d84e1c03
--- /dev/null
+++ b/tests/test_000831.textproto
@@ -0,0 +1,152 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using a Top-1ch Expanded Layout."
+  file_name_prefix: "test_000831"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Top-1ch"
+  ]
+  base_test: "test_000827"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_1_CH
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6161
+        digital_peak: -6163
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6161
+        digital_peak: -5392
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_TP_C }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000831_f.mp4 b/tests/test_000831_f.mp4
new file mode 100644
index 00000000..1bda633d
Binary files /dev/null and b/tests/test_000831_f.mp4 differ
diff --git a/tests/test_000831_s.mp4 b/tests/test_000831_s.mp4
new file mode 100644
index 00000000..8c532d1e
Binary files /dev/null and b/tests/test_000831_s.mp4 differ
diff --git a/tests/test_000832.iamf b/tests/test_000832.iamf
new file mode 100644
index 00000000..d8377e8d
Binary files /dev/null and b/tests/test_000832.iamf differ
diff --git a/tests/test_000832.textproto b/tests/test_000832.textproto
new file mode 100644
index 00000000..589d1859
--- /dev/null
+++ b/tests/test_000832.textproto
@@ -0,0 +1,158 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Top-5ch Expanded "
+    "Layout."
+  file_name_prefix: "test_000832"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Top-5ch"
+  ]
+  base_test: "test_000827"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 3
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_5_CH
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2582
+        digital_peak: -2584
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4371
+        digital_peak: -5392
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000832_f.mp4 b/tests/test_000832_f.mp4
new file mode 100644
index 00000000..d84a6ef1
Binary files /dev/null and b/tests/test_000832_f.mp4 differ
diff --git a/tests/test_000832_s.mp4 b/tests/test_000832_s.mp4
new file mode 100644
index 00000000..4257a7da
Binary files /dev/null and b/tests/test_000832_s.mp4 differ
diff --git a/tests/test_000833.iamf b/tests/test_000833.iamf
new file mode 100644
index 00000000..819d01cc
Binary files /dev/null and b/tests/test_000833.iamf differ
diff --git a/tests/test_000833.textproto b/tests/test_000833.textproto
new file mode 100644
index 00000000..13f5b175
--- /dev/null
+++ b/tests/test_000833.textproto
@@ -0,0 +1,218 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a 7.1.5.4ch Expanded "
+    "Layout."
+  file_name_prefix: "test_000833"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 7.1.5.4ch"
+  ]
+  base_test: "test_001016"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 10
+        coupled_substream_count: 7
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_7_1_5_4_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [10]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: 116
+        digital_peak: 114
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -1750
+        digital_peak: -1408
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000833_f.mp4 b/tests/test_000833_f.mp4
new file mode 100644
index 00000000..5e558157
Binary files /dev/null and b/tests/test_000833_f.mp4 differ
diff --git a/tests/test_000833_s.mp4 b/tests/test_000833_s.mp4
new file mode 100644
index 00000000..6e570209
Binary files /dev/null and b/tests/test_000833_s.mp4 differ
diff --git a/tests/test_000834.iamf b/tests/test_000834.iamf
new file mode 100644
index 00000000..33505509
Binary files /dev/null and b/tests/test_000834.iamf differ
diff --git a/tests/test_000834.textproto b/tests/test_000834.textproto
new file mode 100644
index 00000000..fc895032
--- /dev/null
+++ b/tests/test_000834.textproto
@@ -0,0 +1,205 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using an LFE-Pair Expanded Layout."
+  file_name_prefix: "test_000834"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == LFE-Pair"
+  ]
+  base_test: "test_000833"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_LFE_PAIR
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2, 3, 4, 5]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_3_1_2_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 4
+        coupled_substream_count: 2
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3176
+        digital_peak: -3177
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_13_6_9_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4371
+        digital_peak: -3177
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_LFE2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_3 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_3 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LTF_3 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RTF_3 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000834_f.mp4 b/tests/test_000834_f.mp4
new file mode 100644
index 00000000..4ec0142b
Binary files /dev/null and b/tests/test_000834_f.mp4 differ
diff --git a/tests/test_000834_s.mp4 b/tests/test_000834_s.mp4
new file mode 100644
index 00000000..a2e673bc
Binary files /dev/null and b/tests/test_000834_s.mp4 differ
diff --git a/tests/test_000835.iamf b/tests/test_000835.iamf
new file mode 100644
index 00000000..23bd38ca
Binary files /dev/null and b/tests/test_000835.iamf differ
diff --git a/tests/test_000835.textproto b/tests/test_000835.textproto
new file mode 100644
index 00000000..ec5b0660
--- /dev/null
+++ b/tests/test_000835.textproto
@@ -0,0 +1,208 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Bottom-3ch Expanded "
+    "Layout."
+  file_name_prefix: "test_000835"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Bottom-3ch"
+  ]
+  base_test: "test_000833"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2, 3, 4, 5]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_5_1_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 4
+        coupled_substream_count: 2
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2241
+        digital_peak: -2243
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3163
+        digital_peak: -3851
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_5 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_5 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LS_5 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RS_5 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000835_f.mp4 b/tests/test_000835_f.mp4
new file mode 100644
index 00000000..6bb95ef8
Binary files /dev/null and b/tests/test_000835_f.mp4 differ
diff --git a/tests/test_000835_s.mp4 b/tests/test_000835_s.mp4
new file mode 100644
index 00000000..0fedcbb4
Binary files /dev/null and b/tests/test_000835_s.mp4 differ
diff --git a/tests/test_000836.iamf b/tests/test_000836.iamf
new file mode 100644
index 00000000..5355a3e2
Binary files /dev/null and b/tests/test_000836.iamf differ
diff --git a/tests/test_000836.textproto b/tests/test_000836.textproto
new file mode 100644
index 00000000..86a508ce
--- /dev/null
+++ b/tests/test_000836.textproto
@@ -0,0 +1,211 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Bottom-4ch Expanded "
+    "Layout."
+  file_name_prefix: "test_000836"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Bottom-4ch"
+  ]
+  base_test: "test_000833"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_4_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2, 3, 4, 5, 6]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_5_1_2_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 5
+        coupled_substream_count: 3
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -1318
+        digital_peak: -1320
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2343
+        digital_peak: -1813
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_5 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_5 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LS_5 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RS_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LTF_2 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RTF_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000836_f.mp4 b/tests/test_000836_f.mp4
new file mode 100644
index 00000000..1d8f7183
Binary files /dev/null and b/tests/test_000836_f.mp4 differ
diff --git a/tests/test_000836_s.mp4 b/tests/test_000836_s.mp4
new file mode 100644
index 00000000..8309bdc1
Binary files /dev/null and b/tests/test_000836_s.mp4 differ
diff --git a/tests/test_000837.iamf b/tests/test_000837.iamf
new file mode 100644
index 00000000..2ee206ee
Binary files /dev/null and b/tests/test_000837.iamf differ
diff --git a/tests/test_000837.textproto b/tests/test_000837.textproto
new file mode 100644
index 00000000..6ca1d313
--- /dev/null
+++ b/tests/test_000837.textproto
@@ -0,0 +1,215 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using a Top-1ch Expanded Layout."
+  file_name_prefix: "test_000837"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Top-1ch"
+  ]
+  base_test: "test_000833"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_1_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2, 3, 4, 5, 6, 7, 8, 9, 10]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 9
+        coupled_substream_count: 7
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_9_1_6_CH
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -987
+        digital_peak: -989
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2318
+        digital_peak: -3851
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_TP_C }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_SI_R }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000837_f.mp4 b/tests/test_000837_f.mp4
new file mode 100644
index 00000000..0264ec21
Binary files /dev/null and b/tests/test_000837_f.mp4 differ
diff --git a/tests/test_000837_s.mp4 b/tests/test_000837_s.mp4
new file mode 100644
index 00000000..9a9c4179
Binary files /dev/null and b/tests/test_000837_s.mp4 differ
diff --git a/tests/test_000838.iamf b/tests/test_000838.iamf
new file mode 100644
index 00000000..81ce5c88
Binary files /dev/null and b/tests/test_000838.iamf differ
diff --git a/tests/test_000838.textproto b/tests/test_000838.textproto
new file mode 100644
index 00000000..ea983625
--- /dev/null
+++ b/tests/test_000838.textproto
@@ -0,0 +1,216 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Top-5ch Expanded "
+    "Layout."
+  file_name_prefix: "test_000838"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Top-5ch"
+  ]
+  base_test: "test_000833"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 3
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_5_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [3, 4, 5, 6, 7, 8, 9]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_7_1_4_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 7
+        coupled_substream_count: 5
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -667
+        digital_peak: -669
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2504
+        digital_peak: -3851
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000838_f.mp4 b/tests/test_000838_f.mp4
new file mode 100644
index 00000000..ab83f19d
Binary files /dev/null and b/tests/test_000838_f.mp4 differ
diff --git a/tests/test_000838_s.mp4 b/tests/test_000838_s.mp4
new file mode 100644
index 00000000..0d6daa1f
Binary files /dev/null and b/tests/test_000838_s.mp4 differ
diff --git a/tests/test_000839.iamf b/tests/test_000839.iamf
new file mode 100644
index 00000000..9fa2c44e
Binary files /dev/null and b/tests/test_000839.iamf differ
diff --git a/tests/test_000839.textproto b/tests/test_000839.textproto
new file mode 100644
index 00000000..73c79530
--- /dev/null
+++ b/tests/test_000839.textproto
@@ -0,0 +1,213 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using a 7.1.5.4ch Expanded Layout and 0OA."
+  file_name_prefix: "test_000839"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 7.1.5.4ch",
+    "3.6.3/ambisonics_mono_config"
+  ]
+  base_test: "test_000827"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 10
+        coupled_substream_count: 7
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_7_1_5_4_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 1
+      substream_count: 1
+      channel_mapping: [0]
+    }
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -36
+        digital_peak: 848
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -217
+        digital_peak: 684
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000839_f.mp4 b/tests/test_000839_f.mp4
new file mode 100644
index 00000000..9830e602
Binary files /dev/null and b/tests/test_000839_f.mp4 differ
diff --git a/tests/test_000839_s.mp4 b/tests/test_000839_s.mp4
new file mode 100644
index 00000000..4c0569d0
Binary files /dev/null and b/tests/test_000839_s.mp4 differ
diff --git a/tests/test_000840.iamf b/tests/test_000840.iamf
new file mode 100644
index 00000000..2f05bc07
Binary files /dev/null and b/tests/test_000840.iamf differ
diff --git a/tests/test_000840.textproto b/tests/test_000840.textproto
new file mode 100644
index 00000000..be8ff2f2
--- /dev/null
+++ b/tests/test_000840.textproto
@@ -0,0 +1,201 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using a LFE-Pair Expanded Layout and 1OA."
+  file_name_prefix: "test_000840"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == LFE-Pair",
+    "3.6.3/ambisonics_mono_config"
+  ]
+  base_test: "test_000839"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_LFE_PAIR
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 4
+      substream_count: 4
+      channel_mapping: [0, 1, 2, 3]
+    }
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3399
+        digital_peak: -564
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3938
+        digital_peak: -2275
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000840_f.mp4 b/tests/test_000840_f.mp4
new file mode 100644
index 00000000..02e9636b
Binary files /dev/null and b/tests/test_000840_f.mp4 differ
diff --git a/tests/test_000840_s.mp4 b/tests/test_000840_s.mp4
new file mode 100644
index 00000000..dbfcaf16
Binary files /dev/null and b/tests/test_000840_s.mp4 differ
diff --git a/tests/test_000841.iamf b/tests/test_000841.iamf
new file mode 100644
index 00000000..38d28b0f
Binary files /dev/null and b/tests/test_000841.iamf differ
diff --git a/tests/test_000841.textproto b/tests/test_000841.textproto
new file mode 100644
index 00000000..7bbfc0b4
--- /dev/null
+++ b/tests/test_000841.textproto
@@ -0,0 +1,207 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using a Bottom-3ch Expanded Layout and 2OA."
+  file_name_prefix: "test_000841"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Bottom-3ch",
+    "3.6.3/ambisonics_mono_config"
+  ]
+  base_test: "test_000839"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103, 104, 105, 106, 107, 108]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 9
+      substream_count: 9
+      channel_mapping: [0, 1, 2, 3, 4, 5, 6, 7, 8]
+    }
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3308
+        digital_peak: -526
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_C_2_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3765
+        digital_peak: -1077
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000841_f.mp4 b/tests/test_000841_f.mp4
new file mode 100644
index 00000000..e98710c5
Binary files /dev/null and b/tests/test_000841_f.mp4 differ
diff --git a/tests/test_000841_s.mp4 b/tests/test_000841_s.mp4
new file mode 100644
index 00000000..c70cf005
Binary files /dev/null and b/tests/test_000841_s.mp4 differ
diff --git a/tests/test_000842.iamf b/tests/test_000842.iamf
new file mode 100644
index 00000000..859d2aed
Binary files /dev/null and b/tests/test_000842.iamf differ
diff --git a/tests/test_000842.textproto b/tests/test_000842.textproto
new file mode 100644
index 00000000..82e97b6e
--- /dev/null
+++ b/tests/test_000842.textproto
@@ -0,0 +1,221 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using a Bottom-4ch Expanded Layout and 2OA."
+  file_name_prefix: "test_000842"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Bottom-4ch",
+    "3.6.3/ambisonics_projection_config"
+  ]
+  base_test: "test_000839"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_4_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103, 104, 105, 106, 107, 108]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_PROJECTION
+    ambisonics_projection_config {
+      output_channel_count: 9
+      substream_count: 9
+      coupled_substream_count: 0
+# txtpbfmt: off
+      demixing_matrix: [
+        32767, 0, 0, 0, 0, 0, 0, 0, 0,  # col 0
+        0, 32767, 0, 0, 0, 0, 0, 0, 0,  # col 1
+        0, 0, 32767, 0, 0, 0, 0, 0, 0,  # col 2
+        0, 0, 0, 32767, 0, 0, 0, 0, 0,  # col 3
+        0, 0, 0, 0, 32767, 0, 0, 0, 0,  # col 4
+        0, 0, 0, 0, 0, 32767, 0, 0, 0,  # col 5
+        0, 0, 0, 0, 0, 0, 32767, 0, 0,  # col 6
+        0, 0, 0, 0, 0, 0, 0, 32767, 0,  # col 7
+        0, 0, 0, 0, 0, 0, 0, 0, 32767  # col 8
+      ]
+# txtpbfmt: on
+    }
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2666
+        digital_peak: -265
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2809
+        digital_peak: -1628
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 13 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000842_f.mp4 b/tests/test_000842_f.mp4
new file mode 100644
index 00000000..02354239
Binary files /dev/null and b/tests/test_000842_f.mp4 differ
diff --git a/tests/test_000842_s.mp4 b/tests/test_000842_s.mp4
new file mode 100644
index 00000000..6d2c3c16
Binary files /dev/null and b/tests/test_000842_s.mp4 differ
diff --git a/tests/test_000843.iamf b/tests/test_000843.iamf
new file mode 100644
index 00000000..f396e528
Binary files /dev/null and b/tests/test_000843.iamf differ
diff --git a/tests/test_000843.textproto b/tests/test_000843.textproto
new file mode 100644
index 00000000..e72c84cb
--- /dev/null
+++ b/tests/test_000843.textproto
@@ -0,0 +1,249 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using a Top-1ch Expanded Layout and 3OA."
+  file_name_prefix: "test_000843"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Top-1ch",
+    "3.6.3/ambisonics_projection_config"
+  ]
+  base_test: "test_000839"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_1_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [
+    100,
+    101,
+    102,
+    103,
+    104,
+    105,
+    106,
+    107,
+    108,
+    109,
+    110,
+    111,
+    112,
+    113,
+    114,
+    115
+  ]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_PROJECTION
+    ambisonics_projection_config {
+      output_channel_count: 16
+      substream_count: 16
+      coupled_substream_count: 0
+# txtpbfmt: off
+      demixing_matrix: [
+        32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 0
+        0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 1
+        0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 2
+        0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 3
+        0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 4
+        0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 5
+        0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 6
+        0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0,  # col 7
+        0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0,  # col 8
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0,  # col 9
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0,  # col 10
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0,  # col 11
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0,  # col 12
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0,  # col 13
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0,  # col 14
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767   # col 15
+      ]
+# txtpbfmt: on
+    }
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -3806
+        digital_peak: -686
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4218
+        digital_peak: -1472
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_TP_C }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_A_9 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_A_10 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_A_11 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_A_12 },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_A_13 },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_A_14 },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_A_15 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000843_f.mp4 b/tests/test_000843_f.mp4
new file mode 100644
index 00000000..525bc657
Binary files /dev/null and b/tests/test_000843_f.mp4 differ
diff --git a/tests/test_000843_s.mp4 b/tests/test_000843_s.mp4
new file mode 100644
index 00000000..f877314c
Binary files /dev/null and b/tests/test_000843_s.mp4 differ
diff --git a/tests/test_000844.iamf b/tests/test_000844.iamf
new file mode 100644
index 00000000..f442b7ea
Binary files /dev/null and b/tests/test_000844.iamf differ
diff --git a/tests/test_000844.textproto b/tests/test_000844.textproto
new file mode 100644
index 00000000..690727f9
--- /dev/null
+++ b/tests/test_000844.textproto
@@ -0,0 +1,222 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "A Base-Advanced Profile Stream using a Top-5ch Expanded Layout and 2OA."
+  file_name_prefix: "test_000844"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == Top-5ch",
+    "3.6.3/ambisonics_projection_config"
+  ]
+  base_test: "test_000839"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 3
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_5_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103, 104, 105, 106, 107, 108]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_PROJECTION
+    ambisonics_projection_config {
+      output_channel_count: 9
+      substream_count: 9
+      coupled_substream_count: 0
+# txtpbfmt: off
+      demixing_matrix: [
+        32767, 0, 0, 0, 0, 0, 0, 0, 0,  # col 0
+        0, 32767, 0, 0, 0, 0, 0, 0, 0,  # col 1
+        0, 0, 32767, 0, 0, 0, 0, 0, 0,  # col 2
+        0, 0, 0, 32767, 0, 0, 0, 0, 0,  # col 3
+        0, 0, 0, 0, 32767, 0, 0, 0, 0,  # col 4
+        0, 0, 0, 0, 0, 32767, 0, 0, 0,  # col 5
+        0, 0, 0, 0, 0, 0, 32767, 0, 0,  # col 6
+        0, 0, 0, 0, 0, 0, 0, 32767, 0,  # col 7
+        0, 0, 0, 0, 0, 0, 0, 0, 32767  # col 8
+      ]
+# txtpbfmt: on
+    }
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2301
+        digital_peak: -113
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2402
+        digital_peak: -1252
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000844_f.mp4 b/tests/test_000844_f.mp4
new file mode 100644
index 00000000..2b1eb111
Binary files /dev/null and b/tests/test_000844_f.mp4 differ
diff --git a/tests/test_000844_s.mp4 b/tests/test_000844_s.mp4
new file mode 100644
index 00000000..acd6a842
Binary files /dev/null and b/tests/test_000844_s.mp4 differ
diff --git a/tests/test_000845.iamf b/tests/test_000845.iamf
new file mode 100644
index 00000000..2908ca97
Binary files /dev/null and b/tests/test_000845.iamf differ
diff --git a/tests/test_000845.textproto b/tests/test_000845.textproto
new file mode 100644
index 00000000..c4c203ef
--- /dev/null
+++ b/tests/test_000845.textproto
@@ -0,0 +1,221 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An IA Sequence with two LPCM Codec Config OBUs."
+  file_name_prefix: "test_000845"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-11-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: ["4/Multiple Codec Configs"]
+  base_test: "test_000005"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+codec_config_metadata {
+  codec_config_id: 201
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 24
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 201
+  audio_substream_ids: [1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+  }
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_1_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -5897
+        digital_peak: -1777
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s_24bit.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000845_f.mp4 b/tests/test_000845_f.mp4
new file mode 100644
index 00000000..5a091dc2
Binary files /dev/null and b/tests/test_000845_f.mp4 differ
diff --git a/tests/test_000845_s.mp4 b/tests/test_000845_s.mp4
new file mode 100644
index 00000000..90ffd210
Binary files /dev/null and b/tests/test_000845_s.mp4 differ
diff --git a/tests/test_000846.iamf b/tests/test_000846.iamf
new file mode 100644
index 00000000..434bba42
Binary files /dev/null and b/tests/test_000846.iamf differ
diff --git a/tests/test_000846.textproto b/tests/test_000846.textproto
new file mode 100644
index 00000000..08ac145c
--- /dev/null
+++ b/tests/test_000846.textproto
@@ -0,0 +1,232 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An IA Sequence with an LPCM and Opus Codec Config ."
+  file_name_prefix: "test_000846"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-11-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: ["4/Multiple Codec Configs"]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    automatically_override_codec_delay: false
+    automatically_override_audio_roll_distance: false
+    codec_id: CODEC_ID_OPUS
+    num_samples_per_frame: 960
+    audio_roll_distance: -4
+    decoder_config_opus {
+      version: 1
+      pre_skip: 312
+      input_sample_rate: 48000
+      opus_encoder_metadata {
+        target_bitrate_per_channel: 64000
+        application: APPLICATION_AUDIO
+        use_float_api: true
+      }
+    }
+  }
+}
+
+codec_config_metadata {
+  codec_config_id: 201
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 960
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 201
+  audio_substream_ids: [1, 2, 3, 4]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_3_1_2_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 4
+        coupled_substream_count: 2
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+  }
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_1_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -5478
+        digital_peak: -1455
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_3 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_3 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_3 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_3 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000846_f.mp4 b/tests/test_000846_f.mp4
new file mode 100644
index 00000000..d79dabb8
Binary files /dev/null and b/tests/test_000846_f.mp4 differ
diff --git a/tests/test_000846_s.mp4 b/tests/test_000846_s.mp4
new file mode 100644
index 00000000..9a8b02e5
Binary files /dev/null and b/tests/test_000846_s.mp4 differ
diff --git a/tests/test_000847.iamf b/tests/test_000847.iamf
new file mode 100644
index 00000000..cb283bc0
Binary files /dev/null and b/tests/test_000847.iamf differ
diff --git a/tests/test_000847.textproto b/tests/test_000847.textproto
new file mode 100644
index 00000000..5fa24a1c
--- /dev/null
+++ b/tests/test_000847.textproto
@@ -0,0 +1,237 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An IA Sequence with an LPCM and FLAC Codec Config ."
+  file_name_prefix: "test_000847"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-11-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: ["4/Multiple Codec Configs"]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_FLAC
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_flac: {
+      metadata_blocks: {
+        header: {
+          block_type: FLAC_BLOCK_TYPE_STREAMINFO
+        }
+        stream_info {
+          minimum_block_size: 1024
+          maximum_block_size: 1024
+          sample_rate: 48000
+          bits_per_sample: 15  # Flac interprets this as 16 bits.
+          total_samples_in_stream: 24000
+        }
+      }
+      flac_encoder_metadata {
+        compression_level: 5
+      }
+    }
+  }
+}
+
+codec_config_metadata {
+  codec_config_id: 201
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 201
+  audio_substream_ids: [1, 2, 3, 4]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_5_1_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 4
+        coupled_substream_count: 2
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+  }
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_1_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -5386
+        digital_peak: -1398
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_5 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_5 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LS_5 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RS_5 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000847_f.mp4 b/tests/test_000847_f.mp4
new file mode 100644
index 00000000..d2a5f355
Binary files /dev/null and b/tests/test_000847_f.mp4 differ
diff --git a/tests/test_000847_s.mp4 b/tests/test_000847_s.mp4
new file mode 100644
index 00000000..0c6b3a2e
Binary files /dev/null and b/tests/test_000847_s.mp4 differ
diff --git a/tests/test_000848.iamf b/tests/test_000848.iamf
new file mode 100644
index 00000000..00c864b4
Binary files /dev/null and b/tests/test_000848.iamf differ
diff --git a/tests/test_000848.textproto b/tests/test_000848.textproto
new file mode 100644
index 00000000..bf3088e5
--- /dev/null
+++ b/tests/test_000848.textproto
@@ -0,0 +1,237 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An IA Sequence with an LPCM and AAC Codec Config."
+  file_name_prefix: "test_000848"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-11-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: ["4/Multiple Codec Configs"]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+  automatically_override_codec_delay: false
+  automatically_override_audio_roll_distance: false
+    codec_id: CODEC_ID_AAC_LC
+    num_samples_per_frame: 1024
+    audio_roll_distance: -1
+    decoder_config_aac: {
+      buffer_size_db: 0
+      max_bitrate: 0
+      average_bit_rate: 0
+      decoder_specific_info {
+        sample_frequency_index: AAC_SAMPLE_FREQUENCY_INDEX_48000
+      }
+      aac_encoder_metadata {
+        bitrate_mode: 0  #  Constant bit rate mode.
+        enable_afterburner: true
+        signaling_mode: 2  # Explicit hierarchical signaling.
+      }
+    }
+  }
+}
+
+codec_config_metadata {
+  codec_config_id: 201
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 201
+  audio_substream_ids: [1, 2, 3, 4, 5]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_5_1_2_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 5
+        coupled_substream_count: 3
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+  }
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_1_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -5279
+        digital_peak: -1398
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_5 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_5 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LS_5 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RS_5 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_2 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000848_f.mp4 b/tests/test_000848_f.mp4
new file mode 100644
index 00000000..6160cf80
Binary files /dev/null and b/tests/test_000848_f.mp4 differ
diff --git a/tests/test_000848_s.mp4 b/tests/test_000848_s.mp4
new file mode 100644
index 00000000..df380329
Binary files /dev/null and b/tests/test_000848_s.mp4 differ
diff --git a/tests/test_000849.iamf b/tests/test_000849.iamf
new file mode 100644
index 00000000..003e6616
Binary files /dev/null and b/tests/test_000849.iamf differ
diff --git a/tests/test_000849.textproto b/tests/test_000849.textproto
new file mode 100644
index 00000000..a6c69859
--- /dev/null
+++ b/tests/test_000849.textproto
@@ -0,0 +1,223 @@
+# Copyright (c) 2026, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An IA Sequence with two user-defined metadata OBUs."
+  file_name_prefix: "test_000849"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-11-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: ["3.11/Metadata OBUs"]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+metadata_obu_metadata {
+  metadata_itu_t_t35 {
+    itu_t_t35_country_code: 0xFF
+    itu_t_t35_country_code_extension_byte: 112
+  }
+}
+
+metadata_obu_metadata {
+  metadata_iamf_tags {
+    tags {
+      name: "test_key"
+      value: "test_value"
+    }
+  }
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+  }
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_1_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -5897
+        digital_peak: -1777
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000849_f.mp4 b/tests/test_000849_f.mp4
new file mode 100644
index 00000000..6858a106
Binary files /dev/null and b/tests/test_000849_f.mp4 differ
diff --git a/tests/test_000849_s.mp4 b/tests/test_000849_s.mp4
new file mode 100644
index 00000000..fab3a322
Binary files /dev/null and b/tests/test_000849_s.mp4 differ
diff --git a/tests/test_000850.iamf b/tests/test_000850.iamf
new file mode 100644
index 00000000..43b65ac3
Binary files /dev/null and b/tests/test_000850.iamf differ
diff --git a/tests/test_000850.textproto b/tests/test_000850.textproto
new file mode 100644
index 00000000..082c1f4f
--- /dev/null
+++ b/tests/test_000850.textproto
@@ -0,0 +1,536 @@
+# Copyright (c) 2026, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+# TODO(b/477258421): Port the "Arbitrary OBU"s to normal parameter blocks when
+#                    this feature is implemented. Also, enable writing the
+#                    output wav file.
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream with parameter blocks spanning multiple "
+    "frames."
+    "There are twenty four temporal units."
+    "  - The first six are covered by a single parameter block."
+    "  - The next six represent a parameter block gap."
+    "  - The next six are covered by a six-frame parameter block."
+    "  - The last six are covered by a six-frame parameter block."
+  file_name_prefix: "test_000850"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-13 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.7.1/element_gain_offset_config value_type"
+  ]
+  base_test: "test_000800"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_NONE
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 127
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4619
+        digital_peak: -4621
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_48khz_512ms.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_48khz_512ms.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
+
+arbitrary_obu_metadata {
+  # A key frame temporal delimiter.
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 0
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: false  # Key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A six-frame parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 0
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (127)`.
+    "\x7f"
+    # `duration = six 1024-sample frames (leb128)`.
+    "\x80\x30"
+    # `constant_subblock_duration == duration`.
+    "\x80\x30"
+    # `animation_type` = `ANIMATE_STEP`.
+    "\x00"
+    "\xbb\xcc"
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 1024
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 2048
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 3072
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 4096
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 5120
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 6144
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: false  # Key frame.
+    obu_extension_flag: false
+  }
+}
+
+# Tick 6144 has a key frame temporal delimiter, but we omit a parameter block, 
+# to exercise gaps in parameter blocks.
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 7168
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 8192
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 9216
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 10240
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 11264
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 12288
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: false  # Key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A six-frame parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 12288
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (127)`.
+    "\x7f"
+    # `duration = six 1024-sample frames (leb128)`.
+    "\x80\x30"
+    # `constant_subblock_duration == duration`.
+    "\x80\x30"
+    # `animation_type` = `ANIMATE_STEP`.
+    "\x00"
+    "\xbb\xcc"
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 13312
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 14336
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 15360
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 16384
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 17408
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 18432
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: false  # Key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A six-frame parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 18432
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` (127)`.
+    "\x7f"
+    # `duration = six 1024-sample frames (leb128)`.
+    "\x80\x30"
+    # `constant_subblock_duration == duration`.
+    "\x80\x30"
+    # `animation_type` = `ANIMATE_STEP`.
+    "\x00"
+    "\xbb\xcc"
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 19456
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 20480
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 21504
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 22528
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
+
+arbitrary_obu_metadata {
+  # A non-key frame temporal delimiter
+  insertion_hook: INSERTION_HOOK_BEFORE_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 23552
+  obu_type: OBU_IA_TEMPORAL_DELIMITER
+  obu_header {
+    obu_redundant_copy: false
+    obu_trimming_status_flag: true  # Not a key frame.
+    obu_extension_flag: false
+  }
+}
diff --git a/tests/test_000850_f.mp4 b/tests/test_000850_f.mp4
new file mode 100644
index 00000000..34a0ce69
Binary files /dev/null and b/tests/test_000850_f.mp4 differ
diff --git a/tests/test_000850_s.mp4 b/tests/test_000850_s.mp4
new file mode 100644
index 00000000..1c4fbf56
Binary files /dev/null and b/tests/test_000850_s.mp4 differ
diff --git a/tests/test_000851.iamf b/tests/test_000851.iamf
new file mode 100644
index 00000000..cc6f91e3
Binary files /dev/null and b/tests/test_000851.iamf differ
diff --git a/tests/test_000851.textproto b/tests/test_000851.textproto
new file mode 100644
index 00000000..79658551
--- /dev/null
+++ b/tests/test_000851.textproto
@@ -0,0 +1,198 @@
+# Copyright (c) 2026, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream with mix presentation optional fields "
+    "specifying a (reserved) preferred binaural renderer"
+  file_name_prefix: "test_000851"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-23 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.2/optional_fields_flag",
+    "3.7/preferred_binaural_renderer"
+  ]
+  base_test: "test_000854"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4940
+        digital_peak: -1018
+      }
+    }
+  }
+  include_mix_presentation_tags: true
+  mix_presentation_tags {
+    tags: []
+  }
+  optional_fields {
+    preferred_loudspeaker_renderer: PREFERRED_LOUDSPEAKER_RENDERER_NONE
+    preferred_binaural_renderer: PREFERRED_BINAURAL_RENDERER_RESERVED_255
+  }
+  obu_header {
+    obu_trimming_status_flag: true  # Optional fields flag.
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000851_f.mp4 b/tests/test_000851_f.mp4
new file mode 100644
index 00000000..84243279
Binary files /dev/null and b/tests/test_000851_f.mp4 differ
diff --git a/tests/test_000851_s.mp4 b/tests/test_000851_s.mp4
new file mode 100644
index 00000000..e663e7a3
Binary files /dev/null and b/tests/test_000851_s.mp4 differ
diff --git a/tests/test_000852.iamf b/tests/test_000852.iamf
new file mode 100644
index 00000000..02a56399
Binary files /dev/null and b/tests/test_000852.iamf differ
diff --git a/tests/test_000852.textproto b/tests/test_000852.textproto
new file mode 100644
index 00000000..15264767
--- /dev/null
+++ b/tests/test_000852.textproto
@@ -0,0 +1,198 @@
+# Copyright (c) 2026, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream with mix presentation optional fields "
+    "specifying a (reserved) preferred loudspeaker renderer"
+  file_name_prefix: "test_000852"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-23 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.2/optional_fields_flag",
+    "3.7/preferred_loudspeaker_renderer"
+  ]
+  base_test: "test_000854"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4940
+        digital_peak: -1018
+      }
+    }
+  }
+  include_mix_presentation_tags: true
+  mix_presentation_tags {
+    tags: []
+  }
+  optional_fields {
+    preferred_loudspeaker_renderer: PREFERRED_LOUDSPEAKER_RENDERER_RESERVED_255
+    preferred_binaural_renderer: PREFERRED_BINAURAL_RENDERER_NONE
+  }
+  obu_header {
+    obu_trimming_status_flag: true  # Optional fields flag.
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000852_f.mp4 b/tests/test_000852_f.mp4
new file mode 100644
index 00000000..b7ec6673
Binary files /dev/null and b/tests/test_000852_f.mp4 differ
diff --git a/tests/test_000852_s.mp4 b/tests/test_000852_s.mp4
new file mode 100644
index 00000000..32e3c362
Binary files /dev/null and b/tests/test_000852_s.mp4 differ
diff --git a/tests/test_000853.iamf b/tests/test_000853.iamf
new file mode 100644
index 00000000..4ad765bf
Binary files /dev/null and b/tests/test_000853.iamf differ
diff --git a/tests/test_000853.textproto b/tests/test_000853.textproto
new file mode 100644
index 00000000..5a2edd9d
--- /dev/null
+++ b/tests/test_000853.textproto
@@ -0,0 +1,194 @@
+# Copyright (c) 2026, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream with a value-type "
+    "ElementGainOffsetConfig"
+  file_name_prefix: "test_000853"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-13 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.7.1/element_gain_offset_config value_type"
+  ]
+  base_test: "test_000800"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        element_gain_offset_config {
+          value_type {
+            element_gain_offset {
+              q7_dot8: -768  # -3 dB.
+            }
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4940
+        digital_peak: -1018
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000853_f.mp4 b/tests/test_000853_f.mp4
new file mode 100644
index 00000000..6ea3b254
Binary files /dev/null and b/tests/test_000853_f.mp4 differ
diff --git a/tests/test_000853_s.mp4 b/tests/test_000853_s.mp4
new file mode 100644
index 00000000..56085207
Binary files /dev/null and b/tests/test_000853_s.mp4 differ
diff --git a/tests/test_000854.iamf b/tests/test_000854.iamf
new file mode 100644
index 00000000..e196aca0
Binary files /dev/null and b/tests/test_000854.iamf differ
diff --git a/tests/test_000854.textproto b/tests/test_000854.textproto
new file mode 100644
index 00000000..bf5399df
--- /dev/null
+++ b/tests/test_000854.textproto
@@ -0,0 +1,199 @@
+# Copyright (c) 2026, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream with a range-type "
+    "ElementGainOffsetConfig"
+  file_name_prefix: "test_000854"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-13 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.7.1/element_gain_offset_config range_type"
+  ]
+  base_test: "test_000800"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        element_gain_offset_config {
+          range_type {
+            default_element_gain_offset {
+              q7_dot8: -768  # -3 dB.
+            }
+            min_element_gain_offset {
+              q7_dot8: -1536  # -6 dB.
+            }
+            max_element_gain_offset {
+              q7_dot8: 0  # 0 dB.
+            }
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -4940
+        digital_peak: -1018
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000854_f.mp4 b/tests/test_000854_f.mp4
new file mode 100644
index 00000000..8abee868
Binary files /dev/null and b/tests/test_000854_f.mp4 differ
diff --git a/tests/test_000854_s.mp4 b/tests/test_000854_s.mp4
new file mode 100644
index 00000000..dd11f950
Binary files /dev/null and b/tests/test_000854_s.mp4 differ
diff --git a/tests/test_000855.iamf b/tests/test_000855.iamf
new file mode 100644
index 00000000..aad23dbe
Binary files /dev/null and b/tests/test_000855.iamf differ
diff --git a/tests/test_000855.textproto b/tests/test_000855.textproto
new file mode 100644
index 00000000..00c1ab08
--- /dev/null
+++ b/tests/test_000855.textproto
@@ -0,0 +1,471 @@
+# Copyright (c) 2026, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+# TODO(b/479171358): Update this to use syntax for momentary loudness and
+#                    loudness range once it is available in the implementation.
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream with live, momentary, and range loudness "
+    "information provided."
+  file_name_prefix: "test_000855"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-21 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.7.6/info_type == LIVE",
+    "3.7.6/info_type == MOMENTARY_LOUDNESS",
+    "3.7.6/info_type == LOUDNESS_RANGE"
+  ]
+  base_test: "test_000854"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: [
+          LOUDNESS_INFO_TYPE_LIVE,
+          LOUDNESS_INFO_TYPE_RESERVED_8,  # Momentary Loudness.
+          LOUDNESS_INFO_TYPE_RESERVED_16  # Loudness Range.
+        ]
+        integrated_loudness: -4619
+        digital_peak: -4621
+        info_type_bytes:
+          # MomentaryLoudnessParamDefinition
+          "\x7f"  # `parameter_id`
+          "\x80\xf7\x02"  # `parameter_rate` = 48000
+          "\x00"  # `param_definition_mode` (1), reserved (7)
+          "\x80\x08"  # `duration` = 1024
+          "\x80\x08"  # `constant_subblock_duration` = 1024
+          "\x1f\xc0"  # `num_bin_pairs_minus_one` (3) = 0, bin_width_minus_one (6) = 63, first_bin_center (6) = 32, reserved_momentary_loudness (1)
+          "\x18"  # `bin[0]` = 24
+          "\x00"  # `bin[1]`
+          # Loudness range fields:
+          "\x00"  # `loudness_range` (6), `reserved_loudness_range` (2)
+      }
+    }
+  }
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 0
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 1024
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 2048
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 3072
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 4096
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 5120
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 6144
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 7168
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 8192
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 9216
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 10240
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 11264
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 12288
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 13312
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 14336
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 15360
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 16384
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 17408
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 18432
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 19456
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 20480
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 21504
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 22528
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+arbitrary_obu_metadata {
+  # A momentary loudness parameter block.
+  insertion_hook: INSERTION_HOOK_AFTER_PARAMETER_BLOCKS_AT_TICK
+  insertion_tick: 23552
+  obu_type: OBU_IA_PARAMETER_BLOCK
+  payload:
+    # `parameter_id` = 127.
+    "\x7f"
+    "\x48"  # momentary loudness (6), reserved (2)
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_48khz_512ms.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_48khz_512ms.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000855_f.mp4 b/tests/test_000855_f.mp4
new file mode 100644
index 00000000..8cc659f3
Binary files /dev/null and b/tests/test_000855_f.mp4 differ
diff --git a/tests/test_000855_s.mp4 b/tests/test_000855_s.mp4
new file mode 100644
index 00000000..4fd5f161
Binary files /dev/null and b/tests/test_000855_s.mp4 differ
diff --git a/tests/test_000900.iamf b/tests/test_000900.iamf
new file mode 100644
index 00000000..e555cbb7
Binary files /dev/null and b/tests/test_000900.iamf differ
diff --git a/tests/test_000900.textproto b/tests/test_000900.textproto
new file mode 100644
index 00000000..d6555c67
--- /dev/null
+++ b/tests/test_000900.textproto
@@ -0,0 +1,349 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Mono Layout and 4 Mono Polar Objects."
+  file_name_prefix: "test_000900"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition"
+  ]
+  base_test: "test_000839"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 0
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_12_0_1_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000900_f.mp4 b/tests/test_000900_f.mp4
new file mode 100644
index 00000000..1c068677
Binary files /dev/null and b/tests/test_000900_f.mp4 differ
diff --git a/tests/test_000900_s.mp4 b/tests/test_000900_s.mp4
new file mode 100644
index 00000000..e089f892
Binary files /dev/null and b/tests/test_000900_s.mp4 differ
diff --git a/tests/test_000901.iamf b/tests/test_000901.iamf
new file mode 100644
index 00000000..e90be84e
Binary files /dev/null and b/tests/test_000901.iamf differ
diff --git a/tests/test_000901.textproto b/tests/test_000901.textproto
new file mode 100644
index 00000000..04fe928a
--- /dev/null
+++ b/tests/test_000901.textproto
@@ -0,0 +1,338 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo Layout and 4 Mono Polar Objects."
+  file_name_prefix: "test_000901"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition"
+  ]
+  base_test: "test_000901"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000901_f.mp4 b/tests/test_000901_f.mp4
new file mode 100644
index 00000000..1d348fc4
Binary files /dev/null and b/tests/test_000901_f.mp4 differ
diff --git a/tests/test_000901_s.mp4 b/tests/test_000901_s.mp4
new file mode 100644
index 00000000..b915a2c9
Binary files /dev/null and b/tests/test_000901_s.mp4 differ
diff --git a/tests/test_000902.iamf b/tests/test_000902.iamf
new file mode 100644
index 00000000..5ba31340
Binary files /dev/null and b/tests/test_000902.iamf differ
diff --git a/tests/test_000902.textproto b/tests/test_000902.textproto
new file mode 100644
index 00000000..8fcd7b06
--- /dev/null
+++ b/tests/test_000902.textproto
@@ -0,0 +1,354 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a 3_1_2 Layout and 4 Mono Polar Objects."
+  file_name_prefix: "test_000902"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition"
+  ]
+  base_test: "test_000900"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_3_1_2_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 4
+        coupled_substream_count: 2
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_11_2_3_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_3 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_3 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LTF_3 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RTF_3 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000902_f.mp4 b/tests/test_000902_f.mp4
new file mode 100644
index 00000000..4576b3db
Binary files /dev/null and b/tests/test_000902_f.mp4 differ
diff --git a/tests/test_000902_s.mp4 b/tests/test_000902_s.mp4
new file mode 100644
index 00000000..f6351d63
Binary files /dev/null and b/tests/test_000902_s.mp4 differ
diff --git a/tests/test_000903.iamf b/tests/test_000903.iamf
new file mode 100644
index 00000000..b9e3f67d
Binary files /dev/null and b/tests/test_000903.iamf differ
diff --git a/tests/test_000903.textproto b/tests/test_000903.textproto
new file mode 100644
index 00000000..0ea0ffbf
--- /dev/null
+++ b/tests/test_000903.textproto
@@ -0,0 +1,354 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a 5.1 Layout and 4 Mono Polar Objects."
+  file_name_prefix: "test_000903"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition"
+  ]
+  base_test: "test_000900"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_5_1_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 4
+        coupled_substream_count: 2
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_B_0_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_5 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_5 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LS_5 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RS_5 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000903_f.mp4 b/tests/test_000903_f.mp4
new file mode 100644
index 00000000..e5bf36bc
Binary files /dev/null and b/tests/test_000903_f.mp4 differ
diff --git a/tests/test_000903_s.mp4 b/tests/test_000903_s.mp4
new file mode 100644
index 00000000..0cccc070
Binary files /dev/null and b/tests/test_000903_s.mp4 differ
diff --git a/tests/test_000904.iamf b/tests/test_000904.iamf
new file mode 100644
index 00000000..0947328d
Binary files /dev/null and b/tests/test_000904.iamf differ
diff --git a/tests/test_000904.textproto b/tests/test_000904.textproto
new file mode 100644
index 00000000..965bcf20
--- /dev/null
+++ b/tests/test_000904.textproto
@@ -0,0 +1,356 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a 5.1.2 Layout and 4 Mono Polar Objects."
+  file_name_prefix: "test_000904"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition"
+  ]
+  base_test: "test_000900"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_5_1_2_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 5
+        coupled_substream_count: 3
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_C_2_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_5 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_5 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LS_5 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RS_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LTF_2 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RTF_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000904_f.mp4 b/tests/test_000904_f.mp4
new file mode 100644
index 00000000..c21e38d0
Binary files /dev/null and b/tests/test_000904_f.mp4 differ
diff --git a/tests/test_000904_s.mp4 b/tests/test_000904_s.mp4
new file mode 100644
index 00000000..7b119b6b
Binary files /dev/null and b/tests/test_000904_s.mp4 differ
diff --git a/tests/test_000905.iamf b/tests/test_000905.iamf
new file mode 100644
index 00000000..c31577dc
Binary files /dev/null and b/tests/test_000905.iamf differ
diff --git a/tests/test_000905.textproto b/tests/test_000905.textproto
new file mode 100644
index 00000000..05f6f9f8
--- /dev/null
+++ b/tests/test_000905.textproto
@@ -0,0 +1,358 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a 5.1.4 Layout and 4 Mono Polar Objects."
+  file_name_prefix: "test_000905"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition"
+  ]
+  base_test: "test_000900"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_5_1_4_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 6
+        coupled_substream_count: 4
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_5 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_5 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LS_5 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RS_5 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000905_f.mp4 b/tests/test_000905_f.mp4
new file mode 100644
index 00000000..d071a8a7
Binary files /dev/null and b/tests/test_000905_f.mp4 differ
diff --git a/tests/test_000905_s.mp4 b/tests/test_000905_s.mp4
new file mode 100644
index 00000000..c34e6678
Binary files /dev/null and b/tests/test_000905_s.mp4 differ
diff --git a/tests/test_000906.iamf b/tests/test_000906.iamf
new file mode 100644
index 00000000..dec1b5cf
Binary files /dev/null and b/tests/test_000906.iamf differ
diff --git a/tests/test_000906.textproto b/tests/test_000906.textproto
new file mode 100644
index 00000000..a00bcbc6
--- /dev/null
+++ b/tests/test_000906.textproto
@@ -0,0 +1,356 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a 7.1 Layout and 4 Mono Polar Objects."
+  file_name_prefix: "test_000906"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition"
+  ]
+  base_test: "test_000900"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_7_1_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 5
+        coupled_substream_count: 3
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_I_0_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000906_f.mp4 b/tests/test_000906_f.mp4
new file mode 100644
index 00000000..546d5d35
Binary files /dev/null and b/tests/test_000906_f.mp4 differ
diff --git a/tests/test_000906_s.mp4 b/tests/test_000906_s.mp4
new file mode 100644
index 00000000..7bcc84b4
Binary files /dev/null and b/tests/test_000906_s.mp4 differ
diff --git a/tests/test_000907.iamf b/tests/test_000907.iamf
new file mode 100644
index 00000000..6b807c55
Binary files /dev/null and b/tests/test_000907.iamf differ
diff --git a/tests/test_000907.textproto b/tests/test_000907.textproto
new file mode 100644
index 00000000..ba3e88ea
--- /dev/null
+++ b/tests/test_000907.textproto
@@ -0,0 +1,266 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a 7.1.2 Layout and 2 Dual Polar Objects."
+  file_name_prefix: "test_000907"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000900"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_7_1_2_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 6
+        coupled_substream_count: 4
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_10_2_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_2 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000907_f.mp4 b/tests/test_000907_f.mp4
new file mode 100644
index 00000000..3a1f7800
Binary files /dev/null and b/tests/test_000907_f.mp4 differ
diff --git a/tests/test_000907_s.mp4 b/tests/test_000907_s.mp4
new file mode 100644
index 00000000..c6d9b699
Binary files /dev/null and b/tests/test_000907_s.mp4 differ
diff --git a/tests/test_000908.iamf b/tests/test_000908.iamf
new file mode 100644
index 00000000..fe50fcfe
Binary files /dev/null and b/tests/test_000908.iamf differ
diff --git a/tests/test_000908.textproto b/tests/test_000908.textproto
new file mode 100644
index 00000000..00288461
--- /dev/null
+++ b/tests/test_000908.textproto
@@ -0,0 +1,268 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a 7.1.4 Layout and 2 Dual Polar Objects."
+  file_name_prefix: "test_000908"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000907"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_7_1_4_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 7
+        coupled_substream_count: 5
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000908_f.mp4 b/tests/test_000908_f.mp4
new file mode 100644
index 00000000..4927e1a3
Binary files /dev/null and b/tests/test_000908_f.mp4 differ
diff --git a/tests/test_000908_s.mp4 b/tests/test_000908_s.mp4
new file mode 100644
index 00000000..c9abf10b
Binary files /dev/null and b/tests/test_000908_s.mp4 differ
diff --git a/tests/test_000909.iamf b/tests/test_000909.iamf
new file mode 100644
index 00000000..288d7dd1
Binary files /dev/null and b/tests/test_000909.iamf differ
diff --git a/tests/test_000909.textproto b/tests/test_000909.textproto
new file mode 100644
index 00000000..2e1babe3
--- /dev/null
+++ b/tests/test_000909.textproto
@@ -0,0 +1,261 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a 3ch Layout and 2 Dual Polar Objects."
+  file_name_prefix: "test_000909"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout 3.0",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000907"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_3_0_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_13_6_9_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000909_f.mp4 b/tests/test_000909_f.mp4
new file mode 100644
index 00000000..61515871
Binary files /dev/null and b/tests/test_000909_f.mp4 differ
diff --git a/tests/test_000909_s.mp4 b/tests/test_000909_s.mp4
new file mode 100644
index 00000000..327f7eb1
Binary files /dev/null and b/tests/test_000909_s.mp4 differ
diff --git a/tests/test_000910.iamf b/tests/test_000910.iamf
new file mode 100644
index 00000000..3508334a
Binary files /dev/null and b/tests/test_000910.iamf differ
diff --git a/tests/test_000910.textproto b/tests/test_000910.textproto
new file mode 100644
index 00000000..d992bc48
--- /dev/null
+++ b/tests/test_000910.textproto
@@ -0,0 +1,262 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Top4ch Layout and 2 Dual Polar Objects."
+  file_name_prefix: "test_000910"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Top4ch",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000907"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_4_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000910_f.mp4 b/tests/test_000910_f.mp4
new file mode 100644
index 00000000..f5563190
Binary files /dev/null and b/tests/test_000910_f.mp4 differ
diff --git a/tests/test_000910_s.mp4 b/tests/test_000910_s.mp4
new file mode 100644
index 00000000..27e73394
Binary files /dev/null and b/tests/test_000910_s.mp4 differ
diff --git a/tests/test_000911.iamf b/tests/test_000911.iamf
new file mode 100644
index 00000000..7c02602d
Binary files /dev/null and b/tests/test_000911.iamf differ
diff --git a/tests/test_000911.textproto b/tests/test_000911.textproto
new file mode 100644
index 00000000..708f3869
--- /dev/null
+++ b/tests/test_000911.textproto
@@ -0,0 +1,264 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Top6ch Layout and 2 Dual Polar Objects."
+  file_name_prefix: "test_000911"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Top6ch",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000909"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 3
+        coupled_substream_count: 3
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_6_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_H_9_10_3
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 10 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_SI_R }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000911_f.mp4 b/tests/test_000911_f.mp4
new file mode 100644
index 00000000..c9b57c36
Binary files /dev/null and b/tests/test_000911_f.mp4 differ
diff --git a/tests/test_000911_s.mp4 b/tests/test_000911_s.mp4
new file mode 100644
index 00000000..6a2282cc
Binary files /dev/null and b/tests/test_000911_s.mp4 differ
diff --git a/tests/test_000912.iamf b/tests/test_000912.iamf
new file mode 100644
index 00000000..b12f1c86
Binary files /dev/null and b/tests/test_000912.iamf differ
diff --git a/tests/test_000912.textproto b/tests/test_000912.textproto
new file mode 100644
index 00000000..20fde111
--- /dev/null
+++ b/tests/test_000912.textproto
@@ -0,0 +1,258 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using LFE and 2 Dual Polar Objects."
+  file_name_prefix: "test_000912"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout LFE",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config with dual_polar_param_definition"
+  ]
+  base_test: "test_000911"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_LFE
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 30
+              default_first_elevation: 45
+              default_first_distance: 127
+              default_second_azimuth: -30
+              default_second_elevation: 45
+              default_second_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 15
+              default_first_elevation: 45
+              default_first_distance: 127
+              default_second_azimuth: -15
+              default_second_elevation: 45
+              default_second_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000912_f.mp4 b/tests/test_000912_f.mp4
new file mode 100644
index 00000000..1055b0ba
Binary files /dev/null and b/tests/test_000912_f.mp4 differ
diff --git a/tests/test_000912_rendered_binaural.wav b/tests/test_000912_rendered_binaural.wav
new file mode 100644
index 00000000..fd9235c1
Binary files /dev/null and b/tests/test_000912_rendered_binaural.wav differ
diff --git a/tests/test_000912_s.mp4 b/tests/test_000912_s.mp4
new file mode 100644
index 00000000..537a8b02
Binary files /dev/null and b/tests/test_000912_s.mp4 differ
diff --git a/tests/test_000913.iamf b/tests/test_000913.iamf
new file mode 100644
index 00000000..7a081299
Binary files /dev/null and b/tests/test_000913.iamf differ
diff --git a/tests/test_000913.textproto b/tests/test_000913.textproto
new file mode 100644
index 00000000..39c4ad2e
--- /dev/null
+++ b/tests/test_000913.textproto
@@ -0,0 +1,260 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo S Layout and 2 Dual Polar Objects."
+  file_name_prefix: "test_000913"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Stereo S",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000909"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_S
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_12_0_1_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_LS_5 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_RS_5 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000913_f.mp4 b/tests/test_000913_f.mp4
new file mode 100644
index 00000000..4177f692
Binary files /dev/null and b/tests/test_000913_f.mp4 differ
diff --git a/tests/test_000913_s.mp4 b/tests/test_000913_s.mp4
new file mode 100644
index 00000000..ca5a14b3
Binary files /dev/null and b/tests/test_000913_s.mp4 differ
diff --git a/tests/test_000914.iamf b/tests/test_000914.iamf
new file mode 100644
index 00000000..a0c2b7e1
Binary files /dev/null and b/tests/test_000914.iamf differ
diff --git a/tests/test_000914.textproto b/tests/test_000914.textproto
new file mode 100644
index 00000000..b9ad50be
--- /dev/null
+++ b/tests/test_000914.textproto
@@ -0,0 +1,295 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo SS Layout, one Dual Polar and two Mono Polar Objects."
+  file_name_prefix: "test_000914"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Stereo SS",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000913"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_SS
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000914_f.mp4 b/tests/test_000914_f.mp4
new file mode 100644
index 00000000..798f5cf8
Binary files /dev/null and b/tests/test_000914_f.mp4 differ
diff --git a/tests/test_000914_s.mp4 b/tests/test_000914_s.mp4
new file mode 100644
index 00000000..31cf73b4
Binary files /dev/null and b/tests/test_000914_s.mp4 differ
diff --git a/tests/test_000915.iamf b/tests/test_000915.iamf
new file mode 100644
index 00000000..eeef5acf
Binary files /dev/null and b/tests/test_000915.iamf differ
diff --git a/tests/test_000915.textproto b/tests/test_000915.textproto
new file mode 100644
index 00000000..4ece99ea
--- /dev/null
+++ b/tests/test_000915.textproto
@@ -0,0 +1,307 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo RS Layout, one Dual Polar and two Mono Polar Objects."
+  file_name_prefix: "test_000915"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Stereo RS",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000914"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_RS
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_11_2_3_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RRS_7 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000915_f.mp4 b/tests/test_000915_f.mp4
new file mode 100644
index 00000000..c5c7da52
Binary files /dev/null and b/tests/test_000915_f.mp4 differ
diff --git a/tests/test_000915_s.mp4 b/tests/test_000915_s.mp4
new file mode 100644
index 00000000..9960a5e0
Binary files /dev/null and b/tests/test_000915_s.mp4 differ
diff --git a/tests/test_000916.iamf b/tests/test_000916.iamf
new file mode 100644
index 00000000..bfa0c9e6
Binary files /dev/null and b/tests/test_000916.iamf differ
diff --git a/tests/test_000916.textproto b/tests/test_000916.textproto
new file mode 100644
index 00000000..d035e83b
--- /dev/null
+++ b/tests/test_000916.textproto
@@ -0,0 +1,306 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo TF Layout, one Dual Polar and two Mono Polar Objects."
+  file_name_prefix: "test_000916"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Stereo TF",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000913"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_TF
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_B_0_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTF_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000916_f.mp4 b/tests/test_000916_f.mp4
new file mode 100644
index 00000000..d99ca749
Binary files /dev/null and b/tests/test_000916_f.mp4 differ
diff --git a/tests/test_000916_s.mp4 b/tests/test_000916_s.mp4
new file mode 100644
index 00000000..9ffb3f82
Binary files /dev/null and b/tests/test_000916_s.mp4 differ
diff --git a/tests/test_000917.iamf b/tests/test_000917.iamf
new file mode 100644
index 00000000..e0d9667f
Binary files /dev/null and b/tests/test_000917.iamf differ
diff --git a/tests/test_000917.textproto b/tests/test_000917.textproto
new file mode 100644
index 00000000..6fae1dfb
--- /dev/null
+++ b/tests/test_000917.textproto
@@ -0,0 +1,307 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo TB Layout, one Dual Polar and two Mono Polar Objects."
+  file_name_prefix: "test_000917"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Stereo TB",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000914"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_TB
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_C_2_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 12 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000917_f.mp4 b/tests/test_000917_f.mp4
new file mode 100644
index 00000000..b211f6d8
Binary files /dev/null and b/tests/test_000917_f.mp4 differ
diff --git a/tests/test_000917_s.mp4 b/tests/test_000917_s.mp4
new file mode 100644
index 00000000..f36a649f
Binary files /dev/null and b/tests/test_000917_s.mp4 differ
diff --git a/tests/test_000918.iamf b/tests/test_000918.iamf
new file mode 100644
index 00000000..d4b05926
Binary files /dev/null and b/tests/test_000918.iamf differ
diff --git a/tests/test_000918.textproto b/tests/test_000918.textproto
new file mode 100644
index 00000000..ee34a988
--- /dev/null
+++ b/tests/test_000918.textproto
@@ -0,0 +1,307 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo F Layout, one Dual Polar and two Mono Polar Objects."
+  file_name_prefix: "test_000918"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Stereo F",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000915"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_F
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000918_f.mp4 b/tests/test_000918_f.mp4
new file mode 100644
index 00000000..6e09e64e
Binary files /dev/null and b/tests/test_000918_f.mp4 differ
diff --git a/tests/test_000918_s.mp4 b/tests/test_000918_s.mp4
new file mode 100644
index 00000000..5fd7925a
Binary files /dev/null and b/tests/test_000918_s.mp4 differ
diff --git a/tests/test_000919.iamf b/tests/test_000919.iamf
new file mode 100644
index 00000000..0efe15fe
Binary files /dev/null and b/tests/test_000919.iamf differ
diff --git a/tests/test_000919.textproto b/tests/test_000919.textproto
new file mode 100644
index 00000000..c63a9455
--- /dev/null
+++ b/tests/test_000919.textproto
@@ -0,0 +1,307 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo Si Layout, one Dual Polar and two Mono Polar Objects."
+  file_name_prefix: "test_000919"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Stereo Si",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config_ with polar_param_definition",
+    "3.7.2.2/rendering_config_ with dual_polar_param_definition"
+  ]
+  base_test: "test_000915"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_SI
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 1
+              default_first_elevation: 2
+              default_first_distance: 3
+              default_second_azimuth: 4
+              default_second_elevation: 5
+              default_second_distance: 6
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 1
+              default_elevation: 2
+              default_distance: 3
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_I_0_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 8 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_SI_R }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000919_f.mp4 b/tests/test_000919_f.mp4
new file mode 100644
index 00000000..b4fa787c
Binary files /dev/null and b/tests/test_000919_f.mp4 differ
diff --git a/tests/test_000919_s.mp4 b/tests/test_000919_s.mp4
new file mode 100644
index 00000000..bf8d189d
Binary files /dev/null and b/tests/test_000919_s.mp4 differ
diff --git a/tests/test_000920.iamf b/tests/test_000920.iamf
new file mode 100644
index 00000000..23573acf
Binary files /dev/null and b/tests/test_000920.iamf differ
diff --git a/tests/test_000920.textproto b/tests/test_000920.textproto
new file mode 100644
index 00000000..9c1e542a
--- /dev/null
+++ b/tests/test_000920.textproto
@@ -0,0 +1,347 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-1 Profile Stream using 0th Order Ambisonics and "
+    "4 Mono Polar Objects."
+  file_name_prefix: "test_000920"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config with polar_param_definition"
+  ]
+  base_test: "test_000900"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 1
+      substream_count: 1
+      channel_mapping: [0]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 90
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 90
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -90
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -90
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_10_2_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000920_f.mp4 b/tests/test_000920_f.mp4
new file mode 100644
index 00000000..393408dd
Binary files /dev/null and b/tests/test_000920_f.mp4 differ
diff --git a/tests/test_000920_s.mp4 b/tests/test_000920_s.mp4
new file mode 100644
index 00000000..942c39f8
Binary files /dev/null and b/tests/test_000920_s.mp4 differ
diff --git a/tests/test_000921.iamf b/tests/test_000921.iamf
new file mode 100644
index 00000000..4839b05b
Binary files /dev/null and b/tests/test_000921.iamf differ
diff --git a/tests/test_000921.textproto b/tests/test_000921.textproto
new file mode 100644
index 00000000..ac0b108e
--- /dev/null
+++ b/tests/test_000921.textproto
@@ -0,0 +1,350 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-1 Profile Stream using 1st Order Ambisonics and "
+    "4 Mono Polar Objects."
+  file_name_prefix: "test_000921"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config with polar_param_definition"
+  ]
+  base_test: "test_000920"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 4
+      substream_count: 4
+      channel_mapping: [0, 1, 2, 3]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 90
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 90
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -90
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -90
+              default_elevation: 2
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000921_f.mp4 b/tests/test_000921_f.mp4
new file mode 100644
index 00000000..6367e963
Binary files /dev/null and b/tests/test_000921_f.mp4 differ
diff --git a/tests/test_000921_s.mp4 b/tests/test_000921_s.mp4
new file mode 100644
index 00000000..9f8bb22e
Binary files /dev/null and b/tests/test_000921_s.mp4 differ
diff --git a/tests/test_000922.iamf b/tests/test_000922.iamf
new file mode 100644
index 00000000..5dd502de
Binary files /dev/null and b/tests/test_000922.iamf differ
diff --git a/tests/test_000922.textproto b/tests/test_000922.textproto
new file mode 100644
index 00000000..db02a54d
--- /dev/null
+++ b/tests/test_000922.textproto
@@ -0,0 +1,256 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-1 Profile Stream using 0th Order Ambisonics and "
+    "2 Dual Polar Objects."
+  file_name_prefix: "test_000922"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.3/ambisonics_projection_config",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config with dual_polar_param_definition"
+  ]
+  base_test: "test_000920"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_PROJECTION
+    ambisonics_projection_config {
+      output_channel_count: 1
+      substream_count: 1
+      coupled_substream_count: 0
+      demixing_matrix: [32767]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 90
+              default_first_elevation: 2
+              default_first_distance: 127
+              default_second_azimuth: 135
+              default_second_elevation: 2
+              default_second_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: -90
+              default_first_elevation: 2
+              default_first_distance: 127
+              default_second_azimuth: -135
+              default_second_elevation: 2
+              default_second_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_13_6_9_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000922_f.mp4 b/tests/test_000922_f.mp4
new file mode 100644
index 00000000..fc8e2ec3
Binary files /dev/null and b/tests/test_000922_f.mp4 differ
diff --git a/tests/test_000922_s.mp4 b/tests/test_000922_s.mp4
new file mode 100644
index 00000000..564060ab
Binary files /dev/null and b/tests/test_000922_s.mp4 differ
diff --git a/tests/test_000923.iamf b/tests/test_000923.iamf
new file mode 100644
index 00000000..2dafa182
Binary files /dev/null and b/tests/test_000923.iamf differ
diff --git a/tests/test_000923.textproto b/tests/test_000923.textproto
new file mode 100644
index 00000000..3c636eae
--- /dev/null
+++ b/tests/test_000923.textproto
@@ -0,0 +1,265 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-1 Profile Stream using 1st Order Ambisonics and "
+    "2 Dual Polar Objects."
+  file_name_prefix: "test_000923"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-18 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.3/ambisonics_projection_config",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config with dual_polar_param_definition"
+  ]
+  base_test: "test_000920"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_PROJECTION
+    ambisonics_projection_config {
+      output_channel_count: 4
+      substream_count: 2
+      coupled_substream_count: 2
+# txtpbfmt: off
+      demixing_matrix: [
+        32767, 0, 0, 0,  # col 0
+        0, 32767, 0, 0,  # col 1
+        0, 0, 32767, 0,  # col 2
+        0, 0, 0, 32767   # col 3
+      ]
+# txtpbfmt: on
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 1
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 90
+              default_first_elevation: 2
+              default_first_distance: 64
+              default_second_azimuth: 135
+              default_second_elevation: 2
+              default_second_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: -90
+              default_first_elevation: 2
+              default_first_distance: 64
+              default_second_azimuth: -135
+              default_second_elevation: 2
+              default_second_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000923_f.mp4 b/tests/test_000923_f.mp4
new file mode 100644
index 00000000..f491e69a
Binary files /dev/null and b/tests/test_000923_f.mp4 differ
diff --git a/tests/test_000923_s.mp4 b/tests/test_000923_s.mp4
new file mode 100644
index 00000000..c89513f2
Binary files /dev/null and b/tests/test_000923_s.mp4 differ
diff --git a/tests/test_000924.iamf b/tests/test_000924.iamf
new file mode 100644
index 00000000..457dd596
Binary files /dev/null and b/tests/test_000924.iamf differ
diff --git a/tests/test_000924.textproto b/tests/test_000924.textproto
new file mode 100644
index 00000000..6ad8692b
--- /dev/null
+++ b/tests/test_000924.textproto
@@ -0,0 +1,395 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo TpSi Layout, one 0th Order Ambisonics and four Mono Polar Objects."
+  file_name_prefix: "test_000924"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Stereo TpSi",
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config with polar_param_definition"
+  ]
+  base_test: "test_000919"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_STEREO_TP_SI
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 1
+      substream_count: 1
+      channel_mapping: [0]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [104]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 30
+              default_elevation: 0
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -30
+              default_elevation: 0
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 4
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 120
+              default_elevation: 0
+              default_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 305
+        localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 5
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -120
+              default_elevation: 0
+              default_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_H_9_10_3
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 10 channel_label: CHANNEL_LABEL_TP_SI_L },  # Ltb4 in the original file.
+    { channel_id: 11 channel_label: CHANNEL_LABEL_TP_SI_R }  # Rtb4 in the original file.
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000924_f.mp4 b/tests/test_000924_f.mp4
new file mode 100644
index 00000000..a323af20
Binary files /dev/null and b/tests/test_000924_f.mp4 differ
diff --git a/tests/test_000924_s.mp4 b/tests/test_000924_s.mp4
new file mode 100644
index 00000000..a02ecbed
Binary files /dev/null and b/tests/test_000924_s.mp4 differ
diff --git a/tests/test_000925.iamf b/tests/test_000925.iamf
new file mode 100644
index 00000000..afd6a672
Binary files /dev/null and b/tests/test_000925.iamf differ
diff --git a/tests/test_000925.textproto b/tests/test_000925.textproto
new file mode 100644
index 00000000..bec66dd3
--- /dev/null
+++ b/tests/test_000925.textproto
@@ -0,0 +1,394 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a LFE Pair Layout, one 0th Order Ambisonics and four Mono Polar Objects."
+  file_name_prefix: "test_000925"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout LFE-Pair",
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config with polar_param_definition"
+  ]
+  base_test: "test_000924"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_LFE_PAIR
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 1
+      substream_count: 1
+      channel_mapping: [0]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [104]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 101
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -1536  # -6 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 30
+              default_elevation: 0
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -30
+              default_elevation: 0
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 4
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 120
+              default_elevation: 0
+              default_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 305
+        localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 5
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -120
+              default_elevation: 0
+              default_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 102
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout: {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000925_f.mp4 b/tests/test_000925_f.mp4
new file mode 100644
index 00000000..cbf1c03b
Binary files /dev/null and b/tests/test_000925_f.mp4 differ
diff --git a/tests/test_000925_rendered_binaural.wav b/tests/test_000925_rendered_binaural.wav
new file mode 100644
index 00000000..07e4d5a8
Binary files /dev/null and b/tests/test_000925_rendered_binaural.wav differ
diff --git a/tests/test_000925_s.mp4 b/tests/test_000925_s.mp4
new file mode 100644
index 00000000..ddbee1db
Binary files /dev/null and b/tests/test_000925_s.mp4 differ
diff --git a/tests/test_000926.iamf b/tests/test_000926.iamf
new file mode 100644
index 00000000..51e6486a
Binary files /dev/null and b/tests/test_000926.iamf differ
diff --git a/tests/test_000926.textproto b/tests/test_000926.textproto
new file mode 100644
index 00000000..13a4b8ee
--- /dev/null
+++ b/tests/test_000926.textproto
@@ -0,0 +1,396 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Bottom-3ch Layout, one 0th Order Ambisonics and four Mono Polar Objects."
+  file_name_prefix: "test_000926"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Bottom-3ch",
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config with polar_param_definition"
+  ]
+  base_test: "test_000924"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 1
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 1
+      substream_count: 1
+      channel_mapping: [0]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [101]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [102]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [103]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [104]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 30
+              default_elevation: 0
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -30
+              default_elevation: 0
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 4
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 120
+              default_elevation: 0
+              default_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 305
+        localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 5
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -120
+              default_elevation: 0
+              default_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000926_f.mp4 b/tests/test_000926_f.mp4
new file mode 100644
index 00000000..a54f8543
Binary files /dev/null and b/tests/test_000926_f.mp4 differ
diff --git a/tests/test_000926_s.mp4 b/tests/test_000926_s.mp4
new file mode 100644
index 00000000..71fa7424
Binary files /dev/null and b/tests/test_000926_s.mp4 differ
diff --git a/tests/test_000927.iamf b/tests/test_000927.iamf
new file mode 100644
index 00000000..5052f58c
Binary files /dev/null and b/tests/test_000927.iamf differ
diff --git a/tests/test_000927.textproto b/tests/test_000927.textproto
new file mode 100644
index 00000000..bda3c4a5
--- /dev/null
+++ b/tests/test_000927.textproto
@@ -0,0 +1,400 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Bottom 4ch Layout, one 1st Order Ambisonics and four Mono Polar Objects."
+  file_name_prefix: "test_000927"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Bottom 4ch",
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.1/rendering_config with polar_param_definition"
+  ]
+  base_test: "test_000924"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_BOTTOM_4_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 4
+      substream_count: 4
+      channel_mapping: [0, 1, 2, 3]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [400]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [500]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 30
+              default_elevation: 0
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -30
+              default_elevation: 0
+              default_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 304
+        localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 4
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: 120
+              default_elevation: 0
+              default_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 305
+        localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+            polar_param_definition {
+              param_definition {
+                parameter_id: 5
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_azimuth: -120
+              default_elevation: 0
+              default_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_10_2_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000927_f.mp4 b/tests/test_000927_f.mp4
new file mode 100644
index 00000000..5316608c
Binary files /dev/null and b/tests/test_000927_f.mp4 differ
diff --git a/tests/test_000927_s.mp4 b/tests/test_000927_s.mp4
new file mode 100644
index 00000000..689bb5ff
Binary files /dev/null and b/tests/test_000927_s.mp4 differ
diff --git a/tests/test_000928.iamf b/tests/test_000928.iamf
new file mode 100644
index 00000000..675ae4e3
Binary files /dev/null and b/tests/test_000928.iamf differ
diff --git a/tests/test_000928.textproto b/tests/test_000928.textproto
new file mode 100644
index 00000000..ab0d41b6
--- /dev/null
+++ b/tests/test_000928.textproto
@@ -0,0 +1,305 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Top-1ch Layout, one 1st Order Ambisonics and two Dual Polar Objects."
+  file_name_prefix: "test_000928"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Top-1ch",
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config with dual_polar_param_definition"
+  ]
+  base_test: "test_000924"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 0
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_1_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 4
+      substream_count: 4
+      channel_mapping: [0, 1, 2, 3]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 30
+              default_first_elevation: 0
+              default_first_distance: 127
+              default_second_azimuth: -30
+              default_second_elevation: 0
+              default_second_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 120
+              default_first_elevation: 0
+              default_first_distance: 64
+              default_second_azimuth: -120
+              default_second_elevation: 0
+              default_second_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_TP_C }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000928_f.mp4 b/tests/test_000928_f.mp4
new file mode 100644
index 00000000..6d65c6bd
Binary files /dev/null and b/tests/test_000928_f.mp4 differ
diff --git a/tests/test_000928_s.mp4 b/tests/test_000928_s.mp4
new file mode 100644
index 00000000..89b4cbef
Binary files /dev/null and b/tests/test_000928_s.mp4 differ
diff --git a/tests/test_000929.iamf b/tests/test_000929.iamf
new file mode 100644
index 00000000..6497b387
Binary files /dev/null and b/tests/test_000929.iamf differ
diff --git a/tests/test_000929.textproto b/tests/test_000929.textproto
new file mode 100644
index 00000000..990ba231
--- /dev/null
+++ b/tests/test_000929.textproto
@@ -0,0 +1,309 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Top-5ch Layout, one 1st Order Ambisonics and two Dual Polar Objects."
+  file_name_prefix: "test_000929"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/expanded_loudspeaker_layout Top-5ch",
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config with dual_polar_param_definition"
+  ]
+  base_test: "test_000924"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 3
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_5_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 4
+      substream_count: 4
+      channel_mapping: [0, 1, 2, 3]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 30
+              default_first_elevation: 0
+              default_first_distance: 127
+              default_second_azimuth: -30
+              default_second_elevation: 0
+              default_second_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 120
+              default_first_elevation: 0
+              default_first_distance: 64
+              default_second_azimuth: -120
+              default_second_elevation: 0
+              default_second_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_13_6_9_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000929_f.mp4 b/tests/test_000929_f.mp4
new file mode 100644
index 00000000..6362d761
Binary files /dev/null and b/tests/test_000929_f.mp4 differ
diff --git a/tests/test_000929_s.mp4 b/tests/test_000929_s.mp4
new file mode 100644
index 00000000..d4b2a581
Binary files /dev/null and b/tests/test_000929_s.mp4 differ
diff --git a/tests/test_000930.iamf b/tests/test_000930.iamf
new file mode 100644
index 00000000..9f14f717
Binary files /dev/null and b/tests/test_000930.iamf differ
diff --git a/tests/test_000930.textproto b/tests/test_000930.textproto
new file mode 100644
index 00000000..a67fa469
--- /dev/null
+++ b/tests/test_000930.textproto
@@ -0,0 +1,310 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo Layout, one 2nd Order Ambisonics and two Dual Polar Objects."
+  file_name_prefix: "test_000930"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/loudspeaker_layout Stereo",
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config with dual_polar_param_definition"
+  ]
+  base_test: "test_000924"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103, 104, 105, 106, 107, 108]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 9
+      substream_count: 9
+      channel_mapping: [0, 1, 2, 3, 4, 5, 6, 7, 8]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 30
+              default_first_elevation: 0
+              default_first_distance: 127
+              default_second_azimuth: -30
+              default_second_elevation: 0
+              default_second_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 120
+              default_first_elevation: 0
+              default_first_distance: 64
+              default_second_azimuth: -120
+              default_second_elevation: 0
+              default_second_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_H_9_10_3
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000930_f.mp4 b/tests/test_000930_f.mp4
new file mode 100644
index 00000000..0be57345
Binary files /dev/null and b/tests/test_000930_f.mp4 differ
diff --git a/tests/test_000930_s.mp4 b/tests/test_000930_s.mp4
new file mode 100644
index 00000000..50a4317c
Binary files /dev/null and b/tests/test_000930_s.mp4 differ
diff --git a/tests/test_000931.iamf b/tests/test_000931.iamf
new file mode 100644
index 00000000..67c52a48
Binary files /dev/null and b/tests/test_000931.iamf differ
diff --git a/tests/test_000931.textproto b/tests/test_000931.textproto
new file mode 100644
index 00000000..5e3fe0c6
--- /dev/null
+++ b/tests/test_000931.textproto
@@ -0,0 +1,309 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description: "An Advanced-1 Profile Stream using a Stereo Layout, one 2nd Order Ambisonics and two Dual Polar Objects."
+  file_name_prefix: "test_000931"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-12 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.1/loudspeaker_layout Stereo",
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config",
+    "3.7.2.2/rendering_config with dual_polar_param_definition"
+  ]
+  base_test: "test_000924"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED1
+  additional_profile: PROFILE_VERSION_ADVANCED1
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103, 104, 105, 106, 107, 108]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 9
+      substream_count: 9
+      channel_mapping: [0, 1, 2, 3, 4, 5, 6, 7, 8]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements: [
+      {
+        audio_element_id: 300
+        localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 301
+        localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 302
+        localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 2
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 30
+              default_first_elevation: 0
+              default_first_distance: 127
+              default_second_azimuth: -30
+              default_second_elevation: 0
+              default_second_distance: 127
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      },
+      {
+        audio_element_id: 303
+        localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+        rendering_config {
+          headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+          rendering_config_param_definitions {
+            param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+            dual_polar_param_definition {
+              param_definition {
+                parameter_id: 3
+                parameter_rate: 48000
+                param_definition_mode: 1
+              }
+              default_first_azimuth: 120
+              default_first_elevation: 0
+              default_first_distance: 64
+              default_second_azimuth: -120
+              default_second_elevation: 0
+              default_second_distance: 64
+            }
+          }
+        }
+        element_mix_gain {
+          param_definition {
+            parameter_id: 100
+            parameter_rate: 48000
+            param_definition_mode: 1
+            reserved: 0
+          }
+          default_mix_gain: -768  # -3 dB.
+        }
+      }
+    ]
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_000931_f.mp4 b/tests/test_000931_f.mp4
new file mode 100644
index 00000000..1306aa32
Binary files /dev/null and b/tests/test_000931_f.mp4 differ
diff --git a/tests/test_000931_rendered_binaural.wav b/tests/test_000931_rendered_binaural.wav
new file mode 100644
index 00000000..cedc31c1
Binary files /dev/null and b/tests/test_000931_rendered_binaural.wav differ
diff --git a/tests/test_000931_s.mp4 b/tests/test_000931_s.mp4
new file mode 100644
index 00000000..ce089b05
Binary files /dev/null and b/tests/test_000931_s.mp4 differ
diff --git a/tests/test_001000.iamf b/tests/test_001000.iamf
new file mode 100644
index 00000000..e6191af0
Binary files /dev/null and b/tests/test_001000.iamf differ
diff --git a/tests/test_001000.textproto b/tests/test_001000.textproto
new file mode 100644
index 00000000..c80f5179
--- /dev/null
+++ b/tests/test_001000.textproto
@@ -0,0 +1,366 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 9.1.6 Expanded Layout with "
+    "several Mono Polar Objects."
+  file_name_prefix: "test_001000"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 9.1.6ch"
+  ]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 9
+        coupled_substream_count: 7
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_9_1_6_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [400]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 180
+            default_elevation: 3
+            default_distance: 126
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 90
+            default_elevation: 8
+            default_distance: 64
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 75
+            default_elevation: 45
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_12_0_1_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_9.1.6_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_SI_R }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001000_f.mp4 b/tests/test_001000_f.mp4
new file mode 100644
index 00000000..6a6ef89d
Binary files /dev/null and b/tests/test_001000_f.mp4 differ
diff --git a/tests/test_001000_s.mp4 b/tests/test_001000_s.mp4
new file mode 100644
index 00000000..07bde016
Binary files /dev/null and b/tests/test_001000_s.mp4 differ
diff --git a/tests/test_001001.iamf b/tests/test_001001.iamf
new file mode 100644
index 00000000..594de10c
Binary files /dev/null and b/tests/test_001001.iamf differ
diff --git a/tests/test_001001.textproto b/tests/test_001001.textproto
new file mode 100644
index 00000000..bf11fb1f
--- /dev/null
+++ b/tests/test_001001.textproto
@@ -0,0 +1,263 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 7.1.5.4 Expanded Layout with "
+    "several Polar Objects."
+  file_name_prefix: "test_001001"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 7.1.5.4ch"
+  ]
+  base_test: "test_001000"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 10
+        coupled_substream_count: 7
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_7_1_5_4_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 127
+            default_second_azimuth: 180
+            default_second_elevation: 3
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 180
+            default_first_elevation: 3
+            default_first_distance: 127
+            default_second_azimuth: 1
+            default_second_elevation: 2
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001001_f.mp4 b/tests/test_001001_f.mp4
new file mode 100644
index 00000000..0e501fa8
Binary files /dev/null and b/tests/test_001001_f.mp4 differ
diff --git a/tests/test_001001_s.mp4 b/tests/test_001001_s.mp4
new file mode 100644
index 00000000..008613dd
Binary files /dev/null and b/tests/test_001001_s.mp4 differ
diff --git a/tests/test_001002.iamf b/tests/test_001002.iamf
new file mode 100644
index 00000000..06b5a731
Binary files /dev/null and b/tests/test_001002.iamf differ
diff --git a/tests/test_001002.textproto b/tests/test_001002.textproto
new file mode 100644
index 00000000..576adf2c
--- /dev/null
+++ b/tests/test_001002.textproto
@@ -0,0 +1,328 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 10.2.9.3 Expanded Layout with "
+    "several Polar Objects."
+  file_name_prefix: "test_001002"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 10.2.9.3ch"
+  ]
+  base_test: "test_001000"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 16
+        coupled_substream_count: 8
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 127
+            default_second_azimuth: 180
+            default_second_elevation: 3
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 180
+            default_elevation: 3
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 90
+            default_elevation: 8
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_11_2_3_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_BC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_LFE2 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_FC },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_TP_SI_R },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_TP_BC },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001002_f.mp4 b/tests/test_001002_f.mp4
new file mode 100644
index 00000000..723123fa
Binary files /dev/null and b/tests/test_001002_f.mp4 differ
diff --git a/tests/test_001002_s.mp4 b/tests/test_001002_s.mp4
new file mode 100644
index 00000000..ab280f02
Binary files /dev/null and b/tests/test_001002_s.mp4 differ
diff --git a/tests/test_001003.iamf b/tests/test_001003.iamf
new file mode 100644
index 00000000..2fb7aa7b
Binary files /dev/null and b/tests/test_001003.iamf differ
diff --git a/tests/test_001003.textproto b/tests/test_001003.textproto
new file mode 100644
index 00000000..12ea211b
--- /dev/null
+++ b/tests/test_001003.textproto
@@ -0,0 +1,359 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a third-order ambisonics with several "
+    "Mono Polar Objects."
+  file_name_prefix: "test_001003"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config"
+  ]
+  base_test: "test_001000"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 16
+      substream_count: 16
+      channel_mapping: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [400]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 3
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 180
+            default_elevation: 3
+            default_distance: 4
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 90
+            default_elevation: 8
+            default_distance: 9
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 75
+            default_elevation: 45
+            default_distance: 6
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_B_0_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_A_9 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_A_10 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_A_11 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_A_12 },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_A_13 },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_A_14 },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_A_15 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001003_f.mp4 b/tests/test_001003_f.mp4
new file mode 100644
index 00000000..06d007b2
Binary files /dev/null and b/tests/test_001003_f.mp4 differ
diff --git a/tests/test_001003_s.mp4 b/tests/test_001003_s.mp4
new file mode 100644
index 00000000..e3234611
Binary files /dev/null and b/tests/test_001003_s.mp4 differ
diff --git a/tests/test_001004.iamf b/tests/test_001004.iamf
new file mode 100644
index 00000000..681e829b
Binary files /dev/null and b/tests/test_001004.iamf differ
diff --git a/tests/test_001004.textproto b/tests/test_001004.textproto
new file mode 100644
index 00000000..6105488b
--- /dev/null
+++ b/tests/test_001004.textproto
@@ -0,0 +1,318 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a fourth-order ambisonics with "
+    "several Mono Polar Objects to reach the 28-channel limit."
+  file_name_prefix: "test_001004"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.3/ambisonics_mono_config",
+    "3.6.4/objects_config"
+  ]
+  base_test: "test_001003"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 25
+      substream_count: 25
+      channel_mapping: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 180
+            default_elevation: 3
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 90
+            default_elevation: 8
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_C_2_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_A_9 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_A_10 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_A_11 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_A_12 },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_A_13 },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_A_14 },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_A_15 },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_A_16 },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_A_17 },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_A_18 },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_A_19 },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_A_20 },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_A_21 },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_A_22 },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_A_23 },
+    { channel_id: 24 channel_label: CHANNEL_LABEL_A_24 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001004_f.mp4 b/tests/test_001004_f.mp4
new file mode 100644
index 00000000..d0017d05
Binary files /dev/null and b/tests/test_001004_f.mp4 differ
diff --git a/tests/test_001004_s.mp4 b/tests/test_001004_s.mp4
new file mode 100644
index 00000000..4408a179
Binary files /dev/null and b/tests/test_001004_s.mp4 differ
diff --git a/tests/test_001005.iamf b/tests/test_001005.iamf
new file mode 100644
index 00000000..fcbf0fa4
Binary files /dev/null and b/tests/test_001005.iamf differ
diff --git a/tests/test_001005.textproto b/tests/test_001005.textproto
new file mode 100644
index 00000000..6ed014a1
--- /dev/null
+++ b/tests/test_001005.textproto
@@ -0,0 +1,287 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a third-order ambisonics with several "
+    "Dual Polar Objects."
+  file_name_prefix: "test_001005"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-17 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.3/ambisonics_projection_config",
+    "3.6.4/objects_config"
+  ]
+  base_test: "test_001003"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_PROJECTION
+    ambisonics_projection_config {
+      output_channel_count: 16
+      substream_count: 16
+      coupled_substream_count: 0
+# txtpbfmt: off
+      demixing_matrix: [
+        32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 0
+        0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 1
+        0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 2
+        0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 3
+        0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 4
+        0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 5
+        0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 6
+        0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0,  # col 7
+        0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0,  # col 8
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0,  # col 9
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0,  # col 10
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0,  # col 11
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0,  # col 12
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0,  # col 13
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0,  # col 14
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767   # col 15
+      ]
+# txtpbfmt: on
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 45
+            default_first_elevation: 30
+            default_first_distance: 127
+            default_second_azimuth: -45
+            default_second_elevation: 30
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 30
+            default_first_elevation: 30
+            default_first_distance: 127
+            default_second_azimuth: -30
+            default_second_elevation: 30
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_D_4_5_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_A_9 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_A_10 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_A_11 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_A_12 },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_A_13 },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_A_14 },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_A_15 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001005_f.mp4 b/tests/test_001005_f.mp4
new file mode 100644
index 00000000..93bf0ada
Binary files /dev/null and b/tests/test_001005_f.mp4 differ
diff --git a/tests/test_001005_s.mp4 b/tests/test_001005_s.mp4
new file mode 100644
index 00000000..8566086b
Binary files /dev/null and b/tests/test_001005_s.mp4 differ
diff --git a/tests/test_001006.iamf b/tests/test_001006.iamf
new file mode 100644
index 00000000..49247e66
Binary files /dev/null and b/tests/test_001006.iamf differ
diff --git a/tests/test_001006.textproto b/tests/test_001006.textproto
new file mode 100644
index 00000000..60b0181b
--- /dev/null
+++ b/tests/test_001006.textproto
@@ -0,0 +1,300 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 4th-order ambisonics with Mono and "
+    "Dual Polar Objects."
+  file_name_prefix: "test_001006"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-17 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.3/ambisonics_projection_config",
+    "3.6.4/objects_config"
+  ]
+  base_test: "test_001005"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_PROJECTION
+    ambisonics_projection_config {
+      output_channel_count: 25
+      substream_count: 25
+      coupled_substream_count: 0
+# txtpbfmt: off
+      demixing_matrix: [
+        32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 0
+        0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 1
+        0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 2
+        0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 3
+        0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 4
+        0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 5
+        0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 6
+        0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 7
+        0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 8
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 9
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 10
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 11
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 12
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 13
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 14
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0, 0,  # col 15
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0, 0,  # col 16
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0, 0,  # col 17
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0, 0,  # col 18
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0, 0,  # col 19
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0, 0,  # col 20
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0, 0,  # col 21
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0, 0,  # col 22
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767, 0,  # col 23
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32767   # col 24
+      ]
+# txtpbfmt: on
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 45
+            default_first_elevation: 30
+            default_first_distance: 127
+            default_second_azimuth: -45
+            default_second_elevation: 30
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 30
+            default_elevation: 30
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_I_0_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_A_9 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_A_10 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_A_11 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_A_12 },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_A_13 },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_A_14 },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_A_15 },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_A_16 },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_A_17 },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_A_18 },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_A_19 },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_A_20 },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_A_21 },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_A_22 },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_A_23 },
+    { channel_id: 24 channel_label: CHANNEL_LABEL_A_24 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001006_f.mp4 b/tests/test_001006_f.mp4
new file mode 100644
index 00000000..05c38013
Binary files /dev/null and b/tests/test_001006_f.mp4 differ
diff --git a/tests/test_001006_s.mp4 b/tests/test_001006_s.mp4
new file mode 100644
index 00000000..55db5393
Binary files /dev/null and b/tests/test_001006_s.mp4 differ
diff --git a/tests/test_001007.iamf b/tests/test_001007.iamf
new file mode 100644
index 00000000..5ab79a7c
Binary files /dev/null and b/tests/test_001007.iamf differ
diff --git a/tests/test_001007.textproto b/tests/test_001007.textproto
new file mode 100644
index 00000000..f88265a8
--- /dev/null
+++ b/tests/test_001007.textproto
@@ -0,0 +1,408 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 9.1.6 Expanded Layout mixed with "
+    "zeroth-order ambisonics and several Mono Polar Objects."
+  file_name_prefix: "test_001007"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 9.1.6ch"
+  ]
+  base_test: "test_001000"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 9
+        coupled_substream_count: 7
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_9_1_6_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 1
+      substream_count: 1
+      channel_mapping: [0]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [400]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [500]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 180
+            default_elevation: 3
+            default_distance: 126
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 90
+            default_elevation: 8
+            default_distance: 64
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 75
+            default_elevation: 45
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 75
+            default_elevation: 45
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_10_2_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_9.1.6_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_SI_R }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001007_f.mp4 b/tests/test_001007_f.mp4
new file mode 100644
index 00000000..c256f275
Binary files /dev/null and b/tests/test_001007_f.mp4 differ
diff --git a/tests/test_001007_s.mp4 b/tests/test_001007_s.mp4
new file mode 100644
index 00000000..e76bde1a
Binary files /dev/null and b/tests/test_001007_s.mp4 differ
diff --git a/tests/test_001008.iamf b/tests/test_001008.iamf
new file mode 100644
index 00000000..0d8eb2f3
Binary files /dev/null and b/tests/test_001008.iamf differ
diff --git a/tests/test_001008.textproto b/tests/test_001008.textproto
new file mode 100644
index 00000000..7670fd07
--- /dev/null
+++ b/tests/test_001008.textproto
@@ -0,0 +1,412 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 7.1.5.4 Expanded Layout with "
+    "first-order ambisonics and several Mono Polar Objects."
+  file_name_prefix: "test_001008"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 7.1.5.4ch"
+  ]
+  base_test: "test_001001"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 10
+        coupled_substream_count: 7
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_7_1_5_4_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 4
+      substream_count: 4
+      channel_mapping: [0, 1, 2, 3]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [304]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [305]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition: {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 180
+            default_elevation: 3
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 90
+            default_elevation: 8
+            default_distance: 64
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 75
+            default_elevation: 45
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 75
+            default_elevation: 45
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_BT_FR },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_BT_BL },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_BT_BR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001008_f.mp4 b/tests/test_001008_f.mp4
new file mode 100644
index 00000000..7d72d0d5
Binary files /dev/null and b/tests/test_001008_f.mp4 differ
diff --git a/tests/test_001008_s.mp4 b/tests/test_001008_s.mp4
new file mode 100644
index 00000000..95b53272
Binary files /dev/null and b/tests/test_001008_s.mp4 differ
diff --git a/tests/test_001009.iamf b/tests/test_001009.iamf
new file mode 100644
index 00000000..3c066241
Binary files /dev/null and b/tests/test_001009.iamf differ
diff --git a/tests/test_001009.textproto b/tests/test_001009.textproto
new file mode 100644
index 00000000..862ae050
--- /dev/null
+++ b/tests/test_001009.textproto
@@ -0,0 +1,410 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 7.1.4 Expanded Layout mixed with "
+    "second-order ambisonics and several Mono Polar Objects."
+  file_name_prefix: "test_001009"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.6.2/loudspeaker_layout == 7.1.4ch"
+  ]
+  base_test: "test_001000"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_7_1_4_CH
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 7
+        coupled_substream_count: 5
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103, 104, 105, 106, 107, 108]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 9
+      substream_count: 9
+      channel_mapping: [0, 1, 2, 3, 4, 5, 6, 7, 8]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [400]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [500]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+              reserved: 0
+            }
+            default_azimuth: 180
+            default_elevation: 3
+            default_distance: 126
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 90
+            default_elevation: 8
+            default_distance: 64
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 75
+            default_elevation: 45
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 5
+              parameter_rate: 48000
+              param_definition_mode: 1
+              reserved: 0
+            }
+            default_azimuth: 75
+            default_elevation: 45
+            default_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition: {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition: {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_13_6_9_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_7 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_7 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_CENTRE },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_LSS_7 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_RSS_7 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_LRS_7 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_RRS_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001009_f.mp4 b/tests/test_001009_f.mp4
new file mode 100644
index 00000000..c1150c1d
Binary files /dev/null and b/tests/test_001009_f.mp4 differ
diff --git a/tests/test_001009_s.mp4 b/tests/test_001009_s.mp4
new file mode 100644
index 00000000..0a798c17
Binary files /dev/null and b/tests/test_001009_s.mp4 differ
diff --git a/tests/test_001010.iamf b/tests/test_001010.iamf
new file mode 100644
index 00000000..ff072cc5
Binary files /dev/null and b/tests/test_001010.iamf differ
diff --git a/tests/test_001010.textproto b/tests/test_001010.textproto
new file mode 100644
index 00000000..9720a894
--- /dev/null
+++ b/tests/test_001010.textproto
@@ -0,0 +1,315 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a stereo layout mixed with "
+    "third-order ambisonics and several Dual Polar Objects."
+  file_name_prefix: "test_001010"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.6.2/loudspeaker_layout == stereo"
+  ]
+  base_test: "test_001000"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 16
+      substream_count: 16
+      channel_mapping: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 127
+            default_second_azimuth: 180
+            default_second_elevation: 3
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 180
+            default_first_elevation: 3
+            default_first_distance: 127
+            default_second_azimuth: 1
+            default_second_elevation: 2
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_A_9 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_A_10 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_A_11 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_A_12 },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_A_13 },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_A_14 },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_A_15 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001010_f.mp4 b/tests/test_001010_f.mp4
new file mode 100644
index 00000000..56a8d760
Binary files /dev/null and b/tests/test_001010_f.mp4 differ
diff --git a/tests/test_001010_s.mp4 b/tests/test_001010_s.mp4
new file mode 100644
index 00000000..2140f234
Binary files /dev/null and b/tests/test_001010_s.mp4 differ
diff --git a/tests/test_001011.iamf b/tests/test_001011.iamf
new file mode 100644
index 00000000..6a239ab6
Binary files /dev/null and b/tests/test_001011.iamf differ
diff --git a/tests/test_001011.textproto b/tests/test_001011.textproto
new file mode 100644
index 00000000..03af1d4e
--- /dev/null
+++ b/tests/test_001011.textproto
@@ -0,0 +1,315 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a stereo layout mixed with "
+    "third-order ambisonics and several Dual Polar Objects."
+  file_name_prefix: "test_001011"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.6.2/loudspeaker_layout == stereo"
+  ]
+  base_test: "test_001010"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 16
+      substream_count: 16
+      channel_mapping: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [200]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [300]
+  objects_config {
+    num_objects: 2
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 1
+            default_first_elevation: 2
+            default_first_distance: 127
+            default_second_azimuth: 180
+            default_second_elevation: 3
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_DUAL_POLAR
+          dual_polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_first_azimuth: 180
+            default_first_elevation: 3
+            default_first_distance: 127
+            default_second_azimuth: 1
+            default_second_elevation: 2
+            default_second_distance: 127
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_H_9_10_3
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_A_4 },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_A_5 },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_A_6 },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_A_7 },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_A_8 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_A_9 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_A_10 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_A_11 },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_A_12 },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_A_13 },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_A_14 },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_A_15 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL1 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001011_f.mp4 b/tests/test_001011_f.mp4
new file mode 100644
index 00000000..e6a8f2ac
Binary files /dev/null and b/tests/test_001011_f.mp4 differ
diff --git a/tests/test_001011_s.mp4 b/tests/test_001011_s.mp4
new file mode 100644
index 00000000..acf8dce0
Binary files /dev/null and b/tests/test_001011_s.mp4 differ
diff --git a/tests/test_001012.iamf b/tests/test_001012.iamf
new file mode 100644
index 00000000..51c86e68
Binary files /dev/null and b/tests/test_001012.iamf differ
diff --git a/tests/test_001012.textproto b/tests/test_001012.textproto
new file mode 100644
index 00000000..c3a6cc10
--- /dev/null
+++ b/tests/test_001012.textproto
@@ -0,0 +1,1517 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream with twenty-eight Mono Polar "
+    "Objects."
+  file_name_prefix: "test_001012"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.4/objects_config",
+    "3.7.1/rendering_config_ with param_definition_polar"
+  ]
+  base_test: "test_000803"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [1]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 302
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [2]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 303
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [3]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 304
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [4]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 305
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [5]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 306
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [6]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 307
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [7]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 308
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [8]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 309
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [9]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 310
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [10]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 311
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [11]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 312
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [12]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 313
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [13]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 314
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [14]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 315
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [15]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 316
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 317
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [17]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 318
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [18]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 319
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [19]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 320
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [20]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 321
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [21]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 322
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [22]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 323
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [23]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 324
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [24]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 325
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [25]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 326
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [26]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 327
+  audio_element_type: AUDIO_ELEMENT_OBJECT_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [27]
+  objects_config {
+    num_objects: 1
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 1
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 2
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 102
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 302
+      localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 3
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 104
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 303
+      localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 4
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 105
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 304
+      localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 5
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 106
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 305
+      localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 6
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 107
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 306
+      localized_element_annotations: ["test_sub_mix_0_audio_element_6"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 7
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 108
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 307
+      localized_element_annotations: ["test_sub_mix_0_audio_element_7"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 8
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 109
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 308
+      localized_element_annotations: ["test_sub_mix_0_audio_element_8"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 9
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 110
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 309
+      localized_element_annotations: ["test_sub_mix_0_audio_element_9"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 10
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 111
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 310
+      localized_element_annotations: ["test_sub_mix_0_audio_element_10"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 11
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 112
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 311
+      localized_element_annotations: ["test_sub_mix_0_audio_element_11"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 12
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 113
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 312
+      localized_element_annotations: ["test_sub_mix_0_audio_element_12"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 13
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 114
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 313
+      localized_element_annotations: ["test_sub_mix_0_audio_element_13"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 14
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 115
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 314
+      localized_element_annotations: ["test_sub_mix_0_audio_element_14"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 15
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 116
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 315
+      localized_element_annotations: ["test_sub_mix_0_audio_element_15"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 16
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 117
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 316
+      localized_element_annotations: ["test_sub_mix_0_audio_element_16"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 17
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 118
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 317
+      localized_element_annotations: ["test_sub_mix_0_audio_element_17"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 18
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 119
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 318
+      localized_element_annotations: ["test_sub_mix_0_audio_element_18"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 19
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 120
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 319
+      localized_element_annotations: ["test_sub_mix_0_audio_element_19"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 20
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 121
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 320
+      localized_element_annotations: ["test_sub_mix_0_audio_element_20"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 21
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 122
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 321
+      localized_element_annotations: ["test_sub_mix_0_audio_element_21"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 22
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 123
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 322
+      localized_element_annotations: ["test_sub_mix_0_audio_element_22"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 23
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 124
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 323
+      localized_element_annotations: ["test_sub_mix_0_audio_element_23"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 24
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 125
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 324
+      localized_element_annotations: ["test_sub_mix_0_audio_element_24"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 25
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 126
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 325
+      localized_element_annotations: ["test_sub_mix_0_audio_element_25"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 26
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 127
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 326
+      localized_element_annotations: ["test_sub_mix_0_audio_element_26"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 27
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 128
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    audio_elements {
+      audio_element_id: 327
+      localized_element_annotations: ["test_sub_mix_0_audio_element_27"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+        rendering_config_param_definitions {
+          param_definition_type: PARAM_DEFINITION_TYPE_POLAR
+          polar_param_definition {
+            param_definition {
+              parameter_id: 28
+              parameter_rate: 48000
+              param_definition_mode: 1
+            }
+            default_azimuth: 1
+            default_elevation: 2
+            default_distance: 125
+          }
+        }
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 129
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768
+      }
+    }
+
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 302
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 303
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 304
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 305
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 306
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 307
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 308
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 309
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 310
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 311
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 312
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 313
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 314
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 315
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 316
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 317
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 318
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 319
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 320
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 321
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 322
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 323
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 324
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 325
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 326
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 327
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_OBJECT_CHANNEL0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001012_f.mp4 b/tests/test_001012_f.mp4
new file mode 100644
index 00000000..6a1d4b15
Binary files /dev/null and b/tests/test_001012_f.mp4 differ
diff --git a/tests/test_001012_s.mp4 b/tests/test_001012_s.mp4
new file mode 100644
index 00000000..ef207f5b
Binary files /dev/null and b/tests/test_001012_s.mp4 differ
diff --git a/tests/test_001013.iamf b/tests/test_001013.iamf
new file mode 100644
index 00000000..7fb97be1
Binary files /dev/null and b/tests/test_001013.iamf differ
diff --git a/tests/test_001013.textproto b/tests/test_001013.textproto
new file mode 100644
index 00000000..3ab27ae1
--- /dev/null
+++ b/tests/test_001013.textproto
@@ -0,0 +1,174 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 10.2.9.3ch Expanded "
+    "Layout and a Binaural output layout."
+  file_name_prefix: "test_001013"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-06 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 10.2.9.3ch"
+  ]
+  base_test: "test_001016"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 16
+        coupled_substream_count: 8
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -3072  # -12 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2476
+        digital_peak: -2478
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout: {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_BC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_LFE2 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_FC },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_TP_SI_R },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_TP_BC },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001013_f.mp4 b/tests/test_001013_f.mp4
new file mode 100644
index 00000000..707002e7
Binary files /dev/null and b/tests/test_001013_f.mp4 differ
diff --git a/tests/test_001013_rendered_binaural.wav b/tests/test_001013_rendered_binaural.wav
new file mode 100644
index 00000000..64ce98cd
Binary files /dev/null and b/tests/test_001013_rendered_binaural.wav differ
diff --git a/tests/test_001013_s.mp4 b/tests/test_001013_s.mp4
new file mode 100644
index 00000000..4deed424
Binary files /dev/null and b/tests/test_001013_s.mp4 differ
diff --git a/tests/test_001014.iamf b/tests/test_001014.iamf
new file mode 100644
index 00000000..0e46f77e
Binary files /dev/null and b/tests/test_001014.iamf differ
diff --git a/tests/test_001014.textproto b/tests/test_001014.textproto
new file mode 100644
index 00000000..bcb47f22
--- /dev/null
+++ b/tests/test_001014.textproto
@@ -0,0 +1,224 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 10.2.9.3ch Expanded "
+    "Layout mixed with a Mono layout."
+  file_name_prefix: "test_001014"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-06 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 10.2.9.3ch"
+  ]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 16
+        coupled_substream_count: 8
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 0
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -169
+        digital_peak: 410
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_I_0_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -1082
+        digital_peak: -897
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_BC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_LFE2 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_FC },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_TP_SI_R },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_TP_BC },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001014_f.mp4 b/tests/test_001014_f.mp4
new file mode 100644
index 00000000..97d97b12
Binary files /dev/null and b/tests/test_001014_f.mp4 differ
diff --git a/tests/test_001014_s.mp4 b/tests/test_001014_s.mp4
new file mode 100644
index 00000000..2335ebaf
Binary files /dev/null and b/tests/test_001014_s.mp4 differ
diff --git a/tests/test_001015.iamf b/tests/test_001015.iamf
new file mode 100644
index 00000000..35a87810
Binary files /dev/null and b/tests/test_001015.iamf differ
diff --git a/tests/test_001015.textproto b/tests/test_001015.textproto
new file mode 100644
index 00000000..1ad39aee
--- /dev/null
+++ b/tests/test_001015.textproto
@@ -0,0 +1,225 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 10.2.9.3ch Expanded "
+    "Layout mixed with a Stereo layout."
+  file_name_prefix: "test_001015"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-06 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 10.2.9.3ch"
+  ]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 16
+        coupled_substream_count: 8
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -167
+        digital_peak: 619
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_10_2_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -1243
+        digital_peak: -985
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_BC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_LFE2 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_FC },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_TP_SI_R },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_TP_BC },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001015_f.mp4 b/tests/test_001015_f.mp4
new file mode 100644
index 00000000..34d8d13d
Binary files /dev/null and b/tests/test_001015_f.mp4 differ
diff --git a/tests/test_001015_s.mp4 b/tests/test_001015_s.mp4
new file mode 100644
index 00000000..3f1064a2
Binary files /dev/null and b/tests/test_001015_s.mp4 differ
diff --git a/tests/test_001016.iamf b/tests/test_001016.iamf
new file mode 100644
index 00000000..6f8b5836
Binary files /dev/null and b/tests/test_001016.iamf differ
diff --git a/tests/test_001016.textproto b/tests/test_001016.textproto
new file mode 100644
index 00000000..73047911
--- /dev/null
+++ b/tests/test_001016.textproto
@@ -0,0 +1,228 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 10.2.9.3ch Expanded "
+    "Layout."
+  file_name_prefix: "test_001016"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-05 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 10.2.9.3ch"
+  ]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 16
+        coupled_substream_count: 8
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16, 17]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 2
+        coupled_substream_count: 2
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_TOP_4_CH
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -168
+        digital_peak: 980
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_J_4_7_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -1478
+        digital_peak: -836
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_BC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_LFE2 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_FC },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_TP_SI_R },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_TP_BC },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Mechanism_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 8 channel_label: CHANNEL_LABEL_LTF_4 },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_RTF_4 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_LTB_4 },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_RTB_4 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001016_f.mp4 b/tests/test_001016_f.mp4
new file mode 100644
index 00000000..2022dd46
Binary files /dev/null and b/tests/test_001016_f.mp4 differ
diff --git a/tests/test_001016_s.mp4 b/tests/test_001016_s.mp4
new file mode 100644
index 00000000..f488a12a
Binary files /dev/null and b/tests/test_001016_s.mp4 differ
diff --git a/tests/test_001017.iamf b/tests/test_001017.iamf
new file mode 100644
index 00000000..8040d2f7
Binary files /dev/null and b/tests/test_001017.iamf differ
diff --git a/tests/test_001017.textproto b/tests/test_001017.textproto
new file mode 100644
index 00000000..f0b0b94c
--- /dev/null
+++ b/tests/test_001017.textproto
@@ -0,0 +1,219 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 10.2.9.3ch Expanded "
+    "Layout mixed with a zeroth order Ambisonics."
+  file_name_prefix: "test_001017"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-06 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 10.2.9.3ch"
+  ]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 16
+        coupled_substream_count: 8
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 1
+      substream_count: 1
+      channel_mapping: [0]
+    }
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -126
+        digital_peak: 787
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_13_6_9_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -1523
+        digital_peak: -1267
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_BC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_LFE2 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_FC },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_TP_SI_R },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_TP_BC },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001017_f.mp4 b/tests/test_001017_f.mp4
new file mode 100644
index 00000000..85edda7e
Binary files /dev/null and b/tests/test_001017_f.mp4 differ
diff --git a/tests/test_001017_s.mp4 b/tests/test_001017_s.mp4
new file mode 100644
index 00000000..0857feb7
Binary files /dev/null and b/tests/test_001017_s.mp4 differ
diff --git a/tests/test_001018.iamf b/tests/test_001018.iamf
new file mode 100644
index 00000000..13063673
Binary files /dev/null and b/tests/test_001018.iamf differ
diff --git a/tests/test_001018.textproto b/tests/test_001018.textproto
new file mode 100644
index 00000000..da3dda90
--- /dev/null
+++ b/tests/test_001018.textproto
@@ -0,0 +1,222 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 10.2.9.3ch Expanded "
+    "Layout."
+  file_name_prefix: "test_001018"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2025-12-09 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 10.2.9.3ch",
+    "4.2/Advanced-2 Profile"
+  ]
+  base_test: "test_001016"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 16
+        coupled_substream_count: 8
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16, 17, 18, 19]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_MONO
+    ambisonics_mono_config {
+      output_channel_count: 4
+      substream_count: 4
+      channel_mapping: [0, 1, 2, 3]
+    }
+  }
+}
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -130
+        digital_peak: 1107
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_14_5_7_4
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -1702
+        digital_peak: -1499
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_BC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_LFE2 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_FC },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_TP_SI_R },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_TP_BC },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  wav_filename: "Transport_TOA_5s.wav"
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001018_f.mp4 b/tests/test_001018_f.mp4
new file mode 100644
index 00000000..a5f01165
Binary files /dev/null and b/tests/test_001018_f.mp4 differ
diff --git a/tests/test_001018_s.mp4 b/tests/test_001018_s.mp4
new file mode 100644
index 00000000..496e8e7a
Binary files /dev/null and b/tests/test_001018_s.mp4 differ
diff --git a/tests/test_001019.iamf b/tests/test_001019.iamf
new file mode 100644
index 00000000..3bd5b3e0
Binary files /dev/null and b/tests/test_001019.iamf differ
diff --git a/tests/test_001019.textproto b/tests/test_001019.textproto
new file mode 100644
index 00000000..caec32cf
--- /dev/null
+++ b/tests/test_001019.textproto
@@ -0,0 +1,230 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "An Advanced-2 Profile Stream using a 10.2.9.3ch Expanded "
+    "Layout mixed with a first order Ambisonics."
+  file_name_prefix: "test_001019"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-06 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.6.2/loudspeaker_layout == Expanded",
+    "3.6.2/expanded_loudspeaker_layout == 10.2.9.3ch"
+  ]
+  base_test: "test_000845"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_ADVANCED2
+  additional_profile: PROFILE_VERSION_ADVANCED2
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_EXPANDED
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 16
+        coupled_substream_count: 8
+        expanded_loudspeaker_layout: EXPANDED_LOUDSPEAKER_LAYOUT_10_2_9_3_CH
+      }
+    ]
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 301
+  audio_element_type: AUDIO_ELEMENT_SCENE_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [16, 17]
+  ambisonics_config {
+    ambisonics_mode: AMBISONICS_MODE_PROJECTION
+    ambisonics_projection_config {
+      output_channel_count: 4
+      substream_count: 2
+      coupled_substream_count: 2
+# txtpbfmt: off
+      demixing_matrix: [
+        32767, 0, 0, 0,  # col 0
+        0, 32767, 0, 0,  # col 1
+        0, 0, 32767, 0,  # col 2
+        0, 0, 0, 32767   # col 3
+      ]
+# txtpbfmt: on
+    }
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    audio_elements {
+      audio_element_id: 301
+      localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -130
+        digital_peak: 1107
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_H_9_10_3
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -2453
+        digital_peak: -1829
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "sine_1000_4oa_48khz.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_FL },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_FR },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_FC },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_LFE },
+    { channel_id: 4 channel_label: CHANNEL_LABEL_BL },
+    { channel_id: 5 channel_label: CHANNEL_LABEL_BR },
+    { channel_id: 6 channel_label: CHANNEL_LABEL_FLC },
+    { channel_id: 7 channel_label: CHANNEL_LABEL_FRC },
+    { channel_id: 8 channel_label: CHANNEL_LABEL_BC },
+    { channel_id: 9 channel_label: CHANNEL_LABEL_LFE2 },
+    { channel_id: 10 channel_label: CHANNEL_LABEL_SI_L },
+    { channel_id: 11 channel_label: CHANNEL_LABEL_SI_R },
+    { channel_id: 12 channel_label: CHANNEL_LABEL_TP_FL },
+    { channel_id: 13 channel_label: CHANNEL_LABEL_TP_FR },
+    { channel_id: 14 channel_label: CHANNEL_LABEL_TP_FC },
+    { channel_id: 15 channel_label: CHANNEL_LABEL_TP_C },
+    { channel_id: 16 channel_label: CHANNEL_LABEL_TP_BL },
+    { channel_id: 17 channel_label: CHANNEL_LABEL_TP_BR },
+    { channel_id: 18 channel_label: CHANNEL_LABEL_TP_SI_L },
+    { channel_id: 19 channel_label: CHANNEL_LABEL_TP_SI_R },
+    { channel_id: 20 channel_label: CHANNEL_LABEL_TP_BC },
+    { channel_id: 21 channel_label: CHANNEL_LABEL_BT_FC },
+    { channel_id: 22 channel_label: CHANNEL_LABEL_BT_FL },
+    { channel_id: 23 channel_label: CHANNEL_LABEL_BT_FR }
+  ]
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "Transport_TOA_5s.wav"
+  audio_element_id: 301
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_A_0 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_A_1 },
+    { channel_id: 2 channel_label: CHANNEL_LABEL_A_2 },
+    { channel_id: 3 channel_label: CHANNEL_LABEL_A_3 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001019_f.mp4 b/tests/test_001019_f.mp4
new file mode 100644
index 00000000..df83196e
Binary files /dev/null and b/tests/test_001019_f.mp4 differ
diff --git a/tests/test_001019_s.mp4 b/tests/test_001019_s.mp4
new file mode 100644
index 00000000..0dd0f990
Binary files /dev/null and b/tests/test_001019_s.mp4 differ
diff --git a/tests/test_001100.iamf b/tests/test_001100.iamf
new file mode 100644
index 00000000..f84b68d4
Binary files /dev/null and b/tests/test_001100.iamf differ
diff --git a/tests/test_001100.textproto b/tests/test_001100.textproto
new file mode 100644
index 00000000..31268564
--- /dev/null
+++ b/tests/test_001100.textproto
@@ -0,0 +1,153 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Stereo layout and "
+    "a Binaural output layout."
+  file_name_prefix: "test_001100"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-13 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.7.1/headphones_rendering_mode == 2",
+    "3.7.5/layout_type == BINAURAL"
+  ]
+  base_test: "test_000827"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_HEAD_LOCKED
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout: {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001100_f.mp4 b/tests/test_001100_f.mp4
new file mode 100644
index 00000000..e7d655a2
Binary files /dev/null and b/tests/test_001100_f.mp4 differ
diff --git a/tests/test_001100_rendered_binaural.wav b/tests/test_001100_rendered_binaural.wav
new file mode 100644
index 00000000..29f4b500
Binary files /dev/null and b/tests/test_001100_rendered_binaural.wav differ
diff --git a/tests/test_001100_s.mp4 b/tests/test_001100_s.mp4
new file mode 100644
index 00000000..48d2738d
Binary files /dev/null and b/tests/test_001100_s.mp4 differ
diff --git a/tests/test_001101.iamf b/tests/test_001101.iamf
new file mode 100644
index 00000000..4c873e90
Binary files /dev/null and b/tests/test_001101.iamf differ
diff --git a/tests/test_001101.textproto b/tests/test_001101.textproto
new file mode 100644
index 00000000..a6cdde23
--- /dev/null
+++ b/tests/test_001101.textproto
@@ -0,0 +1,155 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Stereo layout and "
+    "a Binaural output layout."
+  file_name_prefix: "test_001101"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-19 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.7.1/headphones_rendering_mode == 1",
+    "3.7.1/binaural_filter_profile == DIRECT",
+    "3.7.5/layout_type == BINAURAL"
+  ]
+  base_test: "test_001100"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        binaural_filter_profile: BINAURAL_FILTER_PROFILE_DIRECT
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout: {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6609
+        digital_peak: -2819
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001101_f.mp4 b/tests/test_001101_f.mp4
new file mode 100644
index 00000000..033302b0
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diff --git a/tests/test_001101_rendered_binaural.wav b/tests/test_001101_rendered_binaural.wav
new file mode 100644
index 00000000..0100d958
Binary files /dev/null and b/tests/test_001101_rendered_binaural.wav differ
diff --git a/tests/test_001101_s.mp4 b/tests/test_001101_s.mp4
new file mode 100644
index 00000000..ee2914ab
Binary files /dev/null and b/tests/test_001101_s.mp4 differ
diff --git a/tests/test_001102.iamf b/tests/test_001102.iamf
new file mode 100644
index 00000000..3a48d3c4
Binary files /dev/null and b/tests/test_001102.iamf differ
diff --git a/tests/test_001102.textproto b/tests/test_001102.textproto
new file mode 100644
index 00000000..63d7de5a
--- /dev/null
+++ b/tests/test_001102.textproto
@@ -0,0 +1,155 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Stereo layout and "
+    "a Binaural output layout."
+  file_name_prefix: "test_001102"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-19 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.7.1/headphones_rendering_mode == 1",
+    "3.7.1/binaural_filter_profile == AMBIENT",
+    "3.7.5/layout_type == BINAURAL"
+  ]
+  base_test: "test_001100"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        binaural_filter_profile: BINAURAL_FILTER_PROFILE_AMBIENT
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout: {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6609
+        digital_peak: -2819
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001102_f.mp4 b/tests/test_001102_f.mp4
new file mode 100644
index 00000000..5ede1ea6
Binary files /dev/null and b/tests/test_001102_f.mp4 differ
diff --git a/tests/test_001102_rendered_binaural.wav b/tests/test_001102_rendered_binaural.wav
new file mode 100644
index 00000000..29f4b500
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diff --git a/tests/test_001102_s.mp4 b/tests/test_001102_s.mp4
new file mode 100644
index 00000000..eed95b0f
Binary files /dev/null and b/tests/test_001102_s.mp4 differ
diff --git a/tests/test_001103.iamf b/tests/test_001103.iamf
new file mode 100644
index 00000000..2395e69d
Binary files /dev/null and b/tests/test_001103.iamf differ
diff --git a/tests/test_001103.textproto b/tests/test_001103.textproto
new file mode 100644
index 00000000..8f223046
--- /dev/null
+++ b/tests/test_001103.textproto
@@ -0,0 +1,155 @@
+# Copyright (c) 2025, Alliance for Open Media. All rights reserved
+#
+# This source code is subject to the terms of the BSD 3-Clause Clear License
+# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+# License was not distributed with this source code in the LICENSE file, you
+# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+# Alliance for Open Media Patent License 1.0 was not distributed with this
+# source code in the PATENTS file, you can obtain it at
+# www.aomedia.org/license/patent.
+
+# proto-file: iamf/cli/proto/user_metadata.proto
+# proto-message: UserMetadata
+
+test_vector_metadata {
+  human_readable_description:
+    "A Base-Advanced Profile Stream using a Stereo layout and "
+    "a Binaural output layout."
+  file_name_prefix: "test_001103"
+  is_valid: true
+  is_valid_to_decode: true
+  validate_user_loudness: false
+  mp4_fixed_timestamp: "2026-01-19 00:00:00"
+  test_repository_tags: [
+    "github/aomediacodec/libiamf/main"
+  ]
+  primary_tested_spec_sections: [
+    "3.7.1/headphones_rendering_mode == 1",
+    "3.7.1/binaural_filter_profile == REVERBERANT",
+    "3.7.5/layout_type == BINAURAL"
+  ]
+  base_test: "test_001100"
+  partition_mix_gain_parameter_blocks: false
+}
+
+encoder_control_metadata {
+  add_build_information_tag: false
+  output_rendered_file_format: OUTPUT_FORMAT_WAV_BIT_DEPTH_AUTOMATIC
+}
+
+ia_sequence_header_metadata {
+  primary_profile: PROFILE_VERSION_BASE_ADVANCED
+  additional_profile: PROFILE_VERSION_BASE_ADVANCED
+}
+
+codec_config_metadata {
+  codec_config_id: 200
+  codec_config {
+    codec_id: CODEC_ID_LPCM
+    num_samples_per_frame: 1024
+    audio_roll_distance: 0
+    decoder_config_lpcm {
+      sample_format_flags: LPCM_LITTLE_ENDIAN
+      sample_size: 16
+      sample_rate: 48000
+    }
+  }
+}
+
+audio_element_metadata {
+  audio_element_id: 300
+  audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
+  reserved: 0
+  codec_config_id: 200
+  audio_substream_ids: [0]
+  scalable_channel_layout_config {
+    reserved: 0
+    channel_audio_layer_configs: [
+      {
+        loudspeaker_layout: LOUDSPEAKER_LAYOUT_STEREO
+        output_gain_is_present_flag: 0
+        recon_gain_is_present_flag: 0
+        reserved_a: 0
+        substream_count: 1
+        coupled_substream_count: 1
+      }
+    ]
+  }
+}
+
+mix_presentation_metadata {
+  mix_presentation_id: 42
+  annotations_language: ["en-us"]
+  localized_presentation_annotations: ["test_mix_pres"]
+  sub_mixes {
+    audio_elements {
+      audio_element_id: 300
+      localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
+      rendering_config {
+        headphones_rendering_mode: HEADPHONES_RENDERING_MODE_BINAURAL_WORLD_LOCKED
+        binaural_filter_profile: BINAURAL_FILTER_PROFILE_REVERBERANT
+      }
+      element_mix_gain {
+        param_definition {
+          parameter_id: 100
+          parameter_rate: 48000
+          param_definition_mode: 1
+          reserved: 0
+        }
+        default_mix_gain: -768  # -3 dB.
+      }
+    }
+    output_mix_gain {
+      param_definition {
+        parameter_id: 101
+        parameter_rate: 48000
+        param_definition_mode: 1
+        reserved: 0
+      }
+      default_mix_gain: 0  # 0 dB.
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
+        ss_layout {
+          sound_system: SOUND_SYSTEM_A_0_2_0
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6481
+        digital_peak: -2560
+      }
+    }
+    layouts {
+      loudness_layout {
+        layout_type: LAYOUT_TYPE_BINAURAL
+        reserved_or_binaural_layout: {
+          reserved: 0
+        }
+      }
+      loudness {
+        info_type_bit_masks: []
+        integrated_loudness: -6609
+        digital_peak: -2819
+      }
+    }
+  }
+
+}
+
+audio_frame_metadata {
+  samples_to_trim_at_end_includes_padding: false
+  samples_to_trim_at_start_includes_codec_delay: false
+  wav_filename: "dialog_clip_stereo.wav"
+  audio_element_id: 300
+  channel_metadatas: [
+    { channel_id: 0 channel_label: CHANNEL_LABEL_L_2 },
+    { channel_id: 1 channel_label: CHANNEL_LABEL_R_2 }
+  ]
+}
+
+temporal_delimiter_metadata {
+  enable_temporal_delimiters: false
+}
diff --git a/tests/test_001103_f.mp4 b/tests/test_001103_f.mp4
new file mode 100644
index 00000000..3f4966a6
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diff --git a/tests/test_001103_rendered_binaural.wav b/tests/test_001103_rendered_binaural.wav
new file mode 100644
index 00000000..b16fdb59
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diff --git a/tests/test_001103_s.mp4 b/tests/test_001103_s.mp4
new file mode 100644
index 00000000..61671043
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