• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1# Copyright (c) 2024, Alliance for Open Media. All rights reserved
2#
3# This source code is subject to the terms of the BSD 3-Clause Clear License
4# and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
5# License was not distributed with this source code in the LICENSE file, you
6# can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
7# Alliance for Open Media Patent License 1.0 was not distributed with this
8# source code in the PATENTS file, you can obtain it at
9# www.aomedia.org/license/patent.
10
11# proto-file: iamf/cli/proto/user_metadata.proto
12# proto-message: UserMetadata
13
14test_vector_metadata {
15  human_readable_description:
16    "An example using which contains one Mix Presentation which uses greater "
17    "than the maximum number of audio elements for Base-Enhanced profile and "
18    "should be ignored. It has a second audio element which encodes "
19    "two audio elements which can be decoded under Base-Enhanced profile."
20  file_name_prefix: "test_000710"
21  # The encoder typically would not produce files with reserved profile values.
22  is_valid: false
23  # The decoder can decode the Mix Presentation with ID = 43.
24  is_valid_to_decode: true
25  validate_user_loudness: true
26  mp4_fixed_timestamp: "2024-08-14 00:00:00"
27  test_repository_tags: ["github/aomediacodec/libiamf/main"]
28  primary_tested_spec_sections: [
29    "3.4/additional_profile == 255",
30    "3.6.2/loudspeaker_layout == Mono",
31    "3.7/num_audio_elements",
32    "3.7.3/sound_system == Stereo",
33    "3.7.4/default_mix_gain",
34    "4.2/Base-Enhanced Profile",
35    "8.5.1/Loudness Information"
36  ]
37  base_test: "test_000705"
38}
39
40encoder_control_metadata {
41  add_build_information_tag: false
42}
43
44ia_sequence_header_metadata {
45  primary_profile: PROFILE_VERSION_BASE_ENHANCED
46  additional_profile: PROFILE_VERSION_RESERVED_255
47}
48
49codec_config_metadata {
50  codec_config_id: 200
51  codec_config {
52    codec_id: CODEC_ID_LPCM
53    num_samples_per_frame: 1024
54    audio_roll_distance: 0
55    decoder_config_lpcm {
56      sample_format_flags: LPCM_LITTLE_ENDIAN
57      sample_size: 16
58      sample_rate: 48000
59    }
60  }
61}
62
63audio_element_metadata: [
64  {
65    audio_element_id: 300
66    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
67    reserved: 0
68    codec_config_id: 200
69    num_substreams: 1
70    audio_substream_ids: [0]
71    num_parameters: 0
72    scalable_channel_layout_config {
73      num_layers: 1
74      reserved: 0
75      channel_audio_layer_configs: [
76        {
77          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
78          output_gain_is_present_flag: 0
79          recon_gain_is_present_flag: 0
80          reserved_a: 0
81          substream_count: 1
82          coupled_substream_count: 0
83        }
84      ]
85    }
86  },
87  {
88    audio_element_id: 301
89    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
90    reserved: 0
91    codec_config_id: 200
92    num_substreams: 1
93    audio_substream_ids: [1]
94    num_parameters: 0
95    scalable_channel_layout_config {
96      num_layers: 1
97      reserved: 0
98      channel_audio_layer_configs: [
99        {
100          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
101          output_gain_is_present_flag: 0
102          recon_gain_is_present_flag: 0
103          reserved_a: 0
104          substream_count: 1
105          coupled_substream_count: 0
106        }
107      ]
108    }
109  },
110  {
111    audio_element_id: 302
112    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
113    reserved: 0
114    codec_config_id: 200
115    num_substreams: 1
116    audio_substream_ids: [2]
117    num_parameters: 0
118    scalable_channel_layout_config {
119      num_layers: 1
120      reserved: 0
121      channel_audio_layer_configs: [
122        {
123          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
124          output_gain_is_present_flag: 0
125          recon_gain_is_present_flag: 0
126          reserved_a: 0
127          substream_count: 1
128          coupled_substream_count: 0
129        }
130      ]
131    }
132  },
133  {
134    audio_element_id: 303
135    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
136    reserved: 0
137    codec_config_id: 200
138    num_substreams: 1
139    audio_substream_ids: [3]
140    num_parameters: 0
141    scalable_channel_layout_config {
142      num_layers: 1
143      reserved: 0
144      channel_audio_layer_configs: [
145        {
146          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
147          output_gain_is_present_flag: 0
148          recon_gain_is_present_flag: 0
149          reserved_a: 0
150          substream_count: 1
151          coupled_substream_count: 0
152        }
153      ]
154    }
155  },
156  {
157    audio_element_id: 304
158    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
159    reserved: 0
160    codec_config_id: 200
161    num_substreams: 1
162    audio_substream_ids: [4]
163    num_parameters: 0
164    scalable_channel_layout_config {
165      num_layers: 1
166      reserved: 0
167      channel_audio_layer_configs: [
168        {
169          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
170          output_gain_is_present_flag: 0
171          recon_gain_is_present_flag: 0
172          reserved_a: 0
173          substream_count: 1
174          coupled_substream_count: 0
175        }
176      ]
177    }
178  },
179  {
180    audio_element_id: 305
181    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
182    reserved: 0
183    codec_config_id: 200
184    num_substreams: 1
185    audio_substream_ids: [5]
186    num_parameters: 0
187    scalable_channel_layout_config {
188      num_layers: 1
189      reserved: 0
190      channel_audio_layer_configs: [
191        {
192          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
193          output_gain_is_present_flag: 0
194          recon_gain_is_present_flag: 0
195          reserved_a: 0
196          substream_count: 1
197          coupled_substream_count: 0
198        }
199      ]
200    }
201  },
202  {
203    audio_element_id: 306
204    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
205    reserved: 0
206    codec_config_id: 200
207    num_substreams: 1
208    audio_substream_ids: [6]
209    num_parameters: 0
210    scalable_channel_layout_config {
211      num_layers: 1
212      reserved: 0
213      channel_audio_layer_configs: [
214        {
215          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
216          output_gain_is_present_flag: 0
217          recon_gain_is_present_flag: 0
218          reserved_a: 0
219          substream_count: 1
220          coupled_substream_count: 0
221        }
222      ]
223    }
224  },
225  {
226    audio_element_id: 307
227    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
228    reserved: 0
229    codec_config_id: 200
230    num_substreams: 1
231    audio_substream_ids: [7]
232    num_parameters: 0
233    scalable_channel_layout_config {
234      num_layers: 1
235      reserved: 0
236      channel_audio_layer_configs: [
237        {
238          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
239          output_gain_is_present_flag: 0
240          recon_gain_is_present_flag: 0
241          reserved_a: 0
242          substream_count: 1
243          coupled_substream_count: 0
244        }
245      ]
246    }
247  },
248  {
249    audio_element_id: 308
250    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
251    reserved: 0
252    codec_config_id: 200
253    num_substreams: 1
254    audio_substream_ids: [8]
255    num_parameters: 0
256    scalable_channel_layout_config {
257      num_layers: 1
258      reserved: 0
259      channel_audio_layer_configs: [
260        {
261          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
262          output_gain_is_present_flag: 0
263          recon_gain_is_present_flag: 0
264          reserved_a: 0
265          substream_count: 1
266          coupled_substream_count: 0
267        }
268      ]
269    }
270  },
271  {
272    audio_element_id: 309
273    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
274    reserved: 0
275    codec_config_id: 200
276    num_substreams: 1
277    audio_substream_ids: [9]
278    num_parameters: 0
279    scalable_channel_layout_config {
280      num_layers: 1
281      reserved: 0
282      channel_audio_layer_configs: [
283        {
284          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
285          output_gain_is_present_flag: 0
286          recon_gain_is_present_flag: 0
287          reserved_a: 0
288          substream_count: 1
289          coupled_substream_count: 0
290        }
291      ]
292    }
293  },
294  {
295    audio_element_id: 310
296    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
297    reserved: 0
298    codec_config_id: 200
299    num_substreams: 1
300    audio_substream_ids: [10]
301    num_parameters: 0
302    scalable_channel_layout_config {
303      num_layers: 1
304      reserved: 0
305      channel_audio_layer_configs: [
306        {
307          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
308          output_gain_is_present_flag: 0
309          recon_gain_is_present_flag: 0
310          reserved_a: 0
311          substream_count: 1
312          coupled_substream_count: 0
313        }
314      ]
315    }
316  },
317  {
318    audio_element_id: 311
319    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
320    reserved: 0
321    codec_config_id: 200
322    num_substreams: 1
323    audio_substream_ids: [11]
324    num_parameters: 0
325    scalable_channel_layout_config {
326      num_layers: 1
327      reserved: 0
328      channel_audio_layer_configs: [
329        {
330          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
331          output_gain_is_present_flag: 0
332          recon_gain_is_present_flag: 0
333          reserved_a: 0
334          substream_count: 1
335          coupled_substream_count: 0
336        }
337      ]
338    }
339  },
340  {
341    audio_element_id: 312
342    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
343    reserved: 0
344    codec_config_id: 200
345    num_substreams: 1
346    audio_substream_ids: [12]
347    num_parameters: 0
348    scalable_channel_layout_config {
349      num_layers: 1
350      reserved: 0
351      channel_audio_layer_configs: [
352        {
353          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
354          output_gain_is_present_flag: 0
355          recon_gain_is_present_flag: 0
356          reserved_a: 0
357          substream_count: 1
358          coupled_substream_count: 0
359        }
360      ]
361    }
362  },
363  {
364    audio_element_id: 313
365    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
366    reserved: 0
367    codec_config_id: 200
368    num_substreams: 1
369    audio_substream_ids: [13]
370    num_parameters: 0
371    scalable_channel_layout_config {
372      num_layers: 1
373      reserved: 0
374      channel_audio_layer_configs: [
375        {
376          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
377          output_gain_is_present_flag: 0
378          recon_gain_is_present_flag: 0
379          reserved_a: 0
380          substream_count: 1
381          coupled_substream_count: 0
382        }
383      ]
384    }
385  },
386  {
387    audio_element_id: 314
388    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
389    reserved: 0
390    codec_config_id: 200
391    num_substreams: 1
392    audio_substream_ids: [14]
393    num_parameters: 0
394    scalable_channel_layout_config {
395      num_layers: 1
396      reserved: 0
397      channel_audio_layer_configs: [
398        {
399          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
400          output_gain_is_present_flag: 0
401          recon_gain_is_present_flag: 0
402          reserved_a: 0
403          substream_count: 1
404          coupled_substream_count: 0
405        }
406      ]
407    }
408  },
409  {
410    audio_element_id: 315
411    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
412    reserved: 0
413    codec_config_id: 200
414    num_substreams: 1
415    audio_substream_ids: [15]
416    num_parameters: 0
417    scalable_channel_layout_config {
418      num_layers: 1
419      reserved: 0
420      channel_audio_layer_configs: [
421        {
422          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
423          output_gain_is_present_flag: 0
424          recon_gain_is_present_flag: 0
425          reserved_a: 0
426          substream_count: 1
427          coupled_substream_count: 0
428        }
429      ]
430    }
431  },
432  {
433    audio_element_id: 316
434    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
435    reserved: 0
436    codec_config_id: 200
437    num_substreams: 1
438    audio_substream_ids: [16]
439    num_parameters: 0
440    scalable_channel_layout_config {
441      num_layers: 1
442      reserved: 0
443      channel_audio_layer_configs: [
444        {
445          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
446          output_gain_is_present_flag: 0
447          recon_gain_is_present_flag: 0
448          reserved_a: 0
449          substream_count: 1
450          coupled_substream_count: 0
451        }
452      ]
453    }
454  },
455  {
456    audio_element_id: 317
457    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
458    reserved: 0
459    codec_config_id: 200
460    num_substreams: 1
461    audio_substream_ids: [17]
462    num_parameters: 0
463    scalable_channel_layout_config {
464      num_layers: 1
465      reserved: 0
466      channel_audio_layer_configs: [
467        {
468          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
469          output_gain_is_present_flag: 0
470          recon_gain_is_present_flag: 0
471          reserved_a: 0
472          substream_count: 1
473          coupled_substream_count: 0
474        }
475      ]
476    }
477  },
478  {
479    audio_element_id: 318
480    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
481    reserved: 0
482    codec_config_id: 200
483    num_substreams: 1
484    audio_substream_ids: [318]
485    num_parameters: 0
486    scalable_channel_layout_config {
487      num_layers: 1
488      reserved: 0
489      channel_audio_layer_configs: [
490        {
491          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
492          output_gain_is_present_flag: 0
493          recon_gain_is_present_flag: 0
494          reserved_a: 0
495          substream_count: 1
496          coupled_substream_count: 0
497        }
498      ]
499    }
500  },
501  {
502    audio_element_id: 319
503    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
504    reserved: 0
505    codec_config_id: 200
506    num_substreams: 1
507    audio_substream_ids: [319]
508    num_parameters: 0
509    scalable_channel_layout_config {
510      num_layers: 1
511      reserved: 0
512      channel_audio_layer_configs: [
513        {
514          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
515          output_gain_is_present_flag: 0
516          recon_gain_is_present_flag: 0
517          reserved_a: 0
518          substream_count: 1
519          coupled_substream_count: 0
520        }
521      ]
522    }
523  },
524  {
525    audio_element_id: 320
526    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
527    reserved: 0
528    codec_config_id: 200
529    num_substreams: 1
530    audio_substream_ids: [20]
531    num_parameters: 0
532    scalable_channel_layout_config {
533      num_layers: 1
534      reserved: 0
535      channel_audio_layer_configs: [
536        {
537          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
538          output_gain_is_present_flag: 0
539          recon_gain_is_present_flag: 0
540          reserved_a: 0
541          substream_count: 1
542          coupled_substream_count: 0
543        }
544      ]
545    }
546  },
547  {
548    audio_element_id: 321
549    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
550    reserved: 0
551    codec_config_id: 200
552    num_substreams: 1
553    audio_substream_ids: [21]
554    num_parameters: 0
555    scalable_channel_layout_config {
556      num_layers: 1
557      reserved: 0
558      channel_audio_layer_configs: [
559        {
560          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
561          output_gain_is_present_flag: 0
562          recon_gain_is_present_flag: 0
563          reserved_a: 0
564          substream_count: 1
565          coupled_substream_count: 0
566        }
567      ]
568    }
569  },
570  {
571    audio_element_id: 322
572    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
573    reserved: 0
574    codec_config_id: 200
575    num_substreams: 1
576    audio_substream_ids: [22]
577    num_parameters: 0
578    scalable_channel_layout_config {
579      num_layers: 1
580      reserved: 0
581      channel_audio_layer_configs: [
582        {
583          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
584          output_gain_is_present_flag: 0
585          recon_gain_is_present_flag: 0
586          reserved_a: 0
587          substream_count: 1
588          coupled_substream_count: 0
589        }
590      ]
591    }
592  },
593  {
594    audio_element_id: 323
595    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
596    reserved: 0
597    codec_config_id: 200
598    num_substreams: 1
599    audio_substream_ids: [23]
600    num_parameters: 0
601    scalable_channel_layout_config {
602      num_layers: 1
603      reserved: 0
604      channel_audio_layer_configs: [
605        {
606          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
607          output_gain_is_present_flag: 0
608          recon_gain_is_present_flag: 0
609          reserved_a: 0
610          substream_count: 1
611          coupled_substream_count: 0
612        }
613      ]
614    }
615  },
616  {
617    audio_element_id: 324
618    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
619    reserved: 0
620    codec_config_id: 200
621    num_substreams: 1
622    audio_substream_ids: [24]
623    num_parameters: 0
624    scalable_channel_layout_config {
625      num_layers: 1
626      reserved: 0
627      channel_audio_layer_configs: [
628        {
629          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
630          output_gain_is_present_flag: 0
631          recon_gain_is_present_flag: 0
632          reserved_a: 0
633          substream_count: 1
634          coupled_substream_count: 0
635        }
636      ]
637    }
638  },
639  {
640    audio_element_id: 325
641    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
642    reserved: 0
643    codec_config_id: 200
644    num_substreams: 1
645    audio_substream_ids: [25]
646    num_parameters: 0
647    scalable_channel_layout_config {
648      num_layers: 1
649      reserved: 0
650      channel_audio_layer_configs: [
651        {
652          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
653          output_gain_is_present_flag: 0
654          recon_gain_is_present_flag: 0
655          reserved_a: 0
656          substream_count: 1
657          coupled_substream_count: 0
658        }
659      ]
660    }
661  },
662  {
663    audio_element_id: 326
664    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
665    reserved: 0
666    codec_config_id: 200
667    num_substreams: 1
668    audio_substream_ids: [26]
669    num_parameters: 0
670    scalable_channel_layout_config {
671      num_layers: 1
672      reserved: 0
673      channel_audio_layer_configs: [
674        {
675          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
676          output_gain_is_present_flag: 0
677          recon_gain_is_present_flag: 0
678          reserved_a: 0
679          substream_count: 1
680          coupled_substream_count: 0
681        }
682      ]
683    }
684  },
685  {
686    audio_element_id: 327
687    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
688    reserved: 0
689    codec_config_id: 200
690    num_substreams: 1
691    audio_substream_ids: [27]
692    num_parameters: 0
693    scalable_channel_layout_config {
694      num_layers: 1
695      reserved: 0
696      channel_audio_layer_configs: [
697        {
698          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
699          output_gain_is_present_flag: 0
700          recon_gain_is_present_flag: 0
701          reserved_a: 0
702          substream_count: 1
703          coupled_substream_count: 0
704        }
705      ]
706    }
707  },
708  {
709    audio_element_id: 328
710    audio_element_type: AUDIO_ELEMENT_CHANNEL_BASED
711    reserved: 0
712    codec_config_id: 200
713    num_substreams: 1
714    audio_substream_ids: [28]
715    num_parameters: 0
716    scalable_channel_layout_config {
717      num_layers: 1
718      reserved: 0
719      channel_audio_layer_configs: [
720        {
721          loudspeaker_layout: LOUDSPEAKER_LAYOUT_MONO
722          output_gain_is_present_flag: 0
723          recon_gain_is_present_flag: 0
724          reserved_a: 0
725          substream_count: 1
726          coupled_substream_count: 0
727        }
728      ]
729    }
730  }
731]
732
733mix_presentation_metadata [
734  {
735    mix_presentation_id: 42
736    count_label: 1
737    annotations_language: ["en-us"]
738    localized_presentation_annotations: ["test_mix_pres"]
739    num_sub_mixes: 1
740    sub_mixes {
741      num_audio_elements: 29
742      audio_elements: [
743        {
744          audio_element_id: 300
745          localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
746          rendering_config {
747            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
748          }
749          element_mix_gain {
750            param_definition {
751              parameter_id: 999  # Non-existent; default will be used
752              parameter_rate: 48000
753              param_definition_mode: 1
754              reserved: 0
755            }
756            default_mix_gain: 0
757          }
758        },
759        {
760          audio_element_id: 301
761          localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
762          rendering_config {
763            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
764          }
765          element_mix_gain {
766            param_definition {
767              parameter_id: 999  # Non-existent; default will be used
768              parameter_rate: 48000
769              param_definition_mode: 1
770              reserved: 0
771            }
772            default_mix_gain: 0
773          }
774        },
775        {
776          audio_element_id: 302
777          localized_element_annotations: ["test_sub_mix_0_audio_element_2"]
778          rendering_config {
779            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
780          }
781          element_mix_gain {
782            param_definition {
783              parameter_id: 999  # Non-existent; default will be used
784              parameter_rate: 48000
785              param_definition_mode: 1
786              reserved: 0
787            }
788            default_mix_gain: 0
789          }
790        },
791        {
792          audio_element_id: 303
793          localized_element_annotations: ["test_sub_mix_0_audio_element_3"]
794          rendering_config {
795            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
796          }
797          element_mix_gain {
798            param_definition {
799              parameter_id: 999  # Non-existent; default will be used
800              parameter_rate: 48000
801              param_definition_mode: 1
802              reserved: 0
803            }
804            default_mix_gain: 0
805          }
806        },
807        {
808          audio_element_id: 304
809          localized_element_annotations: ["test_sub_mix_0_audio_element_4"]
810          rendering_config {
811            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
812          }
813          element_mix_gain {
814            param_definition {
815              parameter_id: 999  # Non-existent; default will be used
816              parameter_rate: 48000
817              param_definition_mode: 1
818              reserved: 0
819            }
820            default_mix_gain: 0
821          }
822        },
823        {
824          audio_element_id: 305
825          localized_element_annotations: ["test_sub_mix_0_audio_element_5"]
826          rendering_config {
827            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
828          }
829          element_mix_gain {
830            param_definition {
831              parameter_id: 999  # Non-existent; default will be used
832              parameter_rate: 48000
833              param_definition_mode: 1
834              reserved: 0
835            }
836            default_mix_gain: 0
837          }
838        },
839        {
840          audio_element_id: 306
841          localized_element_annotations: ["test_sub_mix_0_audio_element_6"]
842          rendering_config {
843            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
844          }
845          element_mix_gain {
846            param_definition {
847              parameter_id: 999  # Non-existent; default will be used
848              parameter_rate: 48000
849              param_definition_mode: 1
850              reserved: 0
851            }
852            default_mix_gain: 0
853          }
854        },
855        {
856          audio_element_id: 307
857          localized_element_annotations: ["test_sub_mix_0_audio_element_7"]
858          rendering_config {
859            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
860          }
861          element_mix_gain {
862            param_definition {
863              parameter_id: 999  # Non-existent; default will be used
864              parameter_rate: 48000
865              param_definition_mode: 1
866              reserved: 0
867            }
868            default_mix_gain: 0
869          }
870        },
871        {
872          audio_element_id: 308
873          localized_element_annotations: ["test_sub_mix_0_audio_element_8"]
874          rendering_config {
875            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
876          }
877          element_mix_gain {
878            param_definition {
879              parameter_id: 999  # Non-existent; default will be used
880              parameter_rate: 48000
881              param_definition_mode: 1
882              reserved: 0
883            }
884            default_mix_gain: 0
885          }
886        },
887        {
888          audio_element_id: 309
889          localized_element_annotations: ["test_sub_mix_0_audio_element_9"]
890          rendering_config {
891            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
892          }
893          element_mix_gain {
894            param_definition {
895              parameter_id: 999  # Non-existent; default will be used
896              parameter_rate: 48000
897              param_definition_mode: 1
898              reserved: 0
899            }
900            default_mix_gain: 0
901          }
902        },
903        {
904          audio_element_id: 310
905          localized_element_annotations: ["test_sub_mix_0_audio_element_10"]
906          rendering_config {
907            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
908          }
909          element_mix_gain {
910            param_definition {
911              parameter_id: 999  # Non-existent; default will be used
912              parameter_rate: 48000
913              param_definition_mode: 1
914              reserved: 0
915            }
916            default_mix_gain: 0
917          }
918        },
919        {
920          audio_element_id: 311
921          localized_element_annotations: ["test_sub_mix_0_audio_element_11"]
922          rendering_config {
923            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
924          }
925          element_mix_gain {
926            param_definition {
927              parameter_id: 999  # Non-existent; default will be used
928              parameter_rate: 48000
929              param_definition_mode: 1
930              reserved: 0
931            }
932            default_mix_gain: 0
933          }
934        },
935        {
936          audio_element_id: 312
937          localized_element_annotations: ["test_sub_mix_0_audio_element_12"]
938          rendering_config {
939            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
940          }
941          element_mix_gain {
942            param_definition {
943              parameter_id: 999  # Non-existent; default will be used
944              parameter_rate: 48000
945              param_definition_mode: 1
946              reserved: 0
947            }
948            default_mix_gain: 0
949          }
950        },
951        {
952          audio_element_id: 313
953          localized_element_annotations: ["test_sub_mix_0_audio_element_13"]
954          rendering_config {
955            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
956          }
957          element_mix_gain {
958            param_definition {
959              parameter_id: 999  # Non-existent; default will be used
960              parameter_rate: 48000
961              param_definition_mode: 1
962              reserved: 0
963            }
964            default_mix_gain: 0
965          }
966        },
967        {
968          audio_element_id: 314
969          localized_element_annotations: ["test_sub_mix_0_audio_element_14"]
970          rendering_config {
971            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
972          }
973          element_mix_gain {
974            param_definition {
975              parameter_id: 999  # Non-existent; default will be used
976              parameter_rate: 48000
977              param_definition_mode: 1
978              reserved: 0
979            }
980            default_mix_gain: 0
981          }
982        },
983        {
984          audio_element_id: 315
985          localized_element_annotations: ["test_sub_mix_0_audio_element_15"]
986          rendering_config {
987            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
988          }
989          element_mix_gain {
990            param_definition {
991              parameter_id: 999  # Non-existent; default will be used
992              parameter_rate: 48000
993              param_definition_mode: 1
994              reserved: 0
995            }
996            default_mix_gain: 0
997          }
998        },
999        {
1000          audio_element_id: 316
1001          localized_element_annotations: ["test_sub_mix_0_audio_element_16"]
1002          rendering_config {
1003            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1004          }
1005          element_mix_gain {
1006            param_definition {
1007              parameter_id: 999  # Non-existent; default will be used
1008              parameter_rate: 48000
1009              param_definition_mode: 1
1010              reserved: 0
1011            }
1012            default_mix_gain: 0
1013          }
1014        },
1015        {
1016          audio_element_id: 317
1017          localized_element_annotations: ["test_sub_mix_0_audio_element_17"]
1018          rendering_config {
1019            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1020          }
1021          element_mix_gain {
1022            param_definition {
1023              parameter_id: 999  # Non-existent; default will be used
1024              parameter_rate: 48000
1025              param_definition_mode: 1
1026              reserved: 0
1027            }
1028            default_mix_gain: 0
1029          }
1030        },
1031        {
1032          audio_element_id: 318
1033          localized_element_annotations: ["test_sub_mix_0_audio_element_18"]
1034          rendering_config {
1035            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1036          }
1037          element_mix_gain {
1038            param_definition {
1039              parameter_id: 999  # Non-existent; default will be used
1040              parameter_rate: 48000
1041              param_definition_mode: 1
1042              reserved: 0
1043            }
1044            default_mix_gain: 0
1045          }
1046        },
1047        {
1048          audio_element_id: 319
1049          localized_element_annotations: ["test_sub_mix_0_audio_element_19"]
1050          rendering_config {
1051            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1052          }
1053          element_mix_gain {
1054            param_definition {
1055              parameter_id: 999  # Non-existent; default will be used
1056              parameter_rate: 48000
1057              param_definition_mode: 1
1058              reserved: 0
1059            }
1060            default_mix_gain: 0
1061          }
1062        },
1063        {
1064          audio_element_id: 320
1065          localized_element_annotations: ["test_sub_mix_0_audio_element_20"]
1066          rendering_config {
1067            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1068          }
1069          element_mix_gain {
1070            param_definition {
1071              parameter_id: 999  # Non-existent; default will be used
1072              parameter_rate: 48000
1073              param_definition_mode: 1
1074              reserved: 0
1075            }
1076            default_mix_gain: 0
1077          }
1078        },
1079        {
1080          audio_element_id: 321
1081          localized_element_annotations: ["test_sub_mix_0_audio_element_21"]
1082          rendering_config {
1083            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1084          }
1085          element_mix_gain {
1086            param_definition {
1087              parameter_id: 999  # Non-existent; default will be used
1088              parameter_rate: 48000
1089              param_definition_mode: 1
1090              reserved: 0
1091            }
1092            default_mix_gain: 0
1093          }
1094        },
1095        {
1096          audio_element_id: 322
1097          localized_element_annotations: ["test_sub_mix_0_audio_element_22"]
1098          rendering_config {
1099            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1100          }
1101          element_mix_gain {
1102            param_definition {
1103              parameter_id: 999  # Non-existent; default will be used
1104              parameter_rate: 48000
1105              param_definition_mode: 1
1106              reserved: 0
1107            }
1108            default_mix_gain: 0
1109          }
1110        },
1111        {
1112          audio_element_id: 323
1113          localized_element_annotations: ["test_sub_mix_0_audio_element_23"]
1114          rendering_config {
1115            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1116          }
1117          element_mix_gain {
1118            param_definition {
1119              parameter_id: 999  # Non-existent; default will be used
1120              parameter_rate: 48000
1121              param_definition_mode: 1
1122              reserved: 0
1123            }
1124            default_mix_gain: 0
1125          }
1126        },
1127        {
1128          audio_element_id: 324
1129          localized_element_annotations: ["test_sub_mix_0_audio_element_24"]
1130          rendering_config {
1131            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1132          }
1133          element_mix_gain {
1134            param_definition {
1135              parameter_id: 999  # Non-existent; default will be used
1136              parameter_rate: 48000
1137              param_definition_mode: 1
1138              reserved: 0
1139            }
1140            default_mix_gain: 0
1141          }
1142        },
1143        {
1144          audio_element_id: 325
1145          localized_element_annotations: ["test_sub_mix_0_audio_element_25"]
1146          rendering_config {
1147            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1148          }
1149          element_mix_gain {
1150            param_definition {
1151              parameter_id: 999  # Non-existent; default will be used
1152              parameter_rate: 48000
1153              param_definition_mode: 1
1154              reserved: 0
1155            }
1156            default_mix_gain: 0
1157          }
1158        },
1159        {
1160          audio_element_id: 326
1161          localized_element_annotations: ["test_sub_mix_0_audio_element_26"]
1162          rendering_config {
1163            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1164          }
1165          element_mix_gain {
1166            param_definition {
1167              parameter_id: 999  # Non-existent; default will be used
1168              parameter_rate: 48000
1169              param_definition_mode: 1
1170              reserved: 0
1171            }
1172            default_mix_gain: 0
1173          }
1174        },
1175        {
1176          audio_element_id: 327
1177          localized_element_annotations: ["test_sub_mix_0_audio_element_27"]
1178          rendering_config {
1179            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1180          }
1181          element_mix_gain {
1182            param_definition {
1183              parameter_id: 999  # Non-existent; default will be used
1184              parameter_rate: 48000
1185              param_definition_mode: 1
1186              reserved: 0
1187            }
1188            default_mix_gain: 0
1189          }
1190        },
1191        {
1192          audio_element_id: 328
1193          localized_element_annotations: ["test_sub_mix_0_audio_element_28"]
1194          rendering_config {
1195            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1196          }
1197          element_mix_gain {
1198            param_definition {
1199              parameter_id: 999  # Non-existent; default will be used
1200              parameter_rate: 48000
1201              param_definition_mode: 1
1202              reserved: 0
1203            }
1204            default_mix_gain: 0
1205          }
1206        }
1207
1208      ]
1209      output_mix_gain {
1210        param_definition {
1211          parameter_id: 997  # Non-existent; default will be used
1212          parameter_rate: 48000
1213          param_definition_mode: 1
1214          reserved: 0
1215        }
1216        default_mix_gain: 0
1217      }
1218      num_layouts: 1
1219      layouts {
1220        loudness_layout {
1221          layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
1222          ss_layout {
1223            sound_system: SOUND_SYSTEM_A_0_2_0
1224            reserved: 0
1225          }
1226        }
1227        loudness {
1228          info_type_bit_masks: []
1229          integrated_loudness: -1402
1230          digital_peak: -1747
1231        }
1232      }
1233    }
1234    include_mix_presentation_tags: true
1235    mix_presentation_tags: {
1236      num_tags: 1
1237      tags: {
1238        tag_name: "content_language"
1239        tag_value: "eng"
1240      }
1241    }
1242  },
1243  {
1244    mix_presentation_id: 43
1245    count_label: 1
1246    annotations_language: ["en-us"]
1247    localized_presentation_annotations: ["test_mix_pres"]
1248    num_sub_mixes: 1
1249    sub_mixes {
1250      num_audio_elements: 2
1251      audio_elements: [
1252        {
1253          audio_element_id: 300
1254          localized_element_annotations: ["test_sub_mix_0_audio_element_0"]
1255          rendering_config {
1256            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1257          }
1258          element_mix_gain {
1259            param_definition {
1260              parameter_id: 999  # Non-existent; default will be used
1261              parameter_rate: 48000
1262              param_definition_mode: 1
1263              reserved: 0
1264            }
1265            default_mix_gain: 0
1266          }
1267        },
1268        {
1269          audio_element_id: 301
1270          localized_element_annotations: ["test_sub_mix_0_audio_element_1"]
1271          rendering_config {
1272            headphones_rendering_mode: HEADPHONES_RENDERING_MODE_STEREO
1273          }
1274          element_mix_gain {
1275            param_definition {
1276              parameter_id: 999  # Non-existent; default will be used
1277              parameter_rate: 48000
1278              param_definition_mode: 1
1279              reserved: 0
1280            }
1281            default_mix_gain: 0
1282          }
1283        }
1284      ]
1285      output_mix_gain {
1286        param_definition {
1287          parameter_id: 997  # Non-existent; default will be used
1288          parameter_rate: 48000
1289          param_definition_mode: 1
1290          reserved: 0
1291        }
1292        default_mix_gain: 0
1293      }
1294      num_layouts: 1
1295      layouts {
1296        loudness_layout {
1297          layout_type: LAYOUT_TYPE_LOUDSPEAKERS_SS_CONVENTION
1298          ss_layout {
1299            sound_system: SOUND_SYSTEM_A_0_2_0
1300            reserved: 0
1301          }
1302        }
1303        loudness {
1304          info_type_bit_masks: []
1305          integrated_loudness: -7349
1306          digital_peak: -7693
1307        }
1308      }
1309    }
1310    include_mix_presentation_tags: true
1311    mix_presentation_tags: {
1312      num_tags: 1
1313      tags: {
1314        tag_name: "content_language"
1315        tag_value: "eng"
1316      }
1317    }
1318  }
1319]
1320
1321audio_frame_metadata: [
1322  {
1323    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1324    samples_to_trim_at_end: 640
1325    samples_to_trim_at_start: 0
1326    audio_element_id: 300
1327    channel_metadatas: [
1328      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1329    ]
1330  },
1331  {
1332    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1333    samples_to_trim_at_end: 640
1334    samples_to_trim_at_start: 0
1335    audio_element_id: 301
1336    channel_metadatas: [
1337      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1338    ]
1339  },
1340  {
1341    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1342    samples_to_trim_at_end: 640
1343    samples_to_trim_at_start: 0
1344    audio_element_id: 302
1345    channel_metadatas: [
1346      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1347    ]
1348  },
1349  {
1350    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1351    samples_to_trim_at_end: 640
1352    samples_to_trim_at_start: 0
1353    audio_element_id: 303
1354    channel_metadatas: [
1355      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1356    ]
1357  },
1358  {
1359    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1360    samples_to_trim_at_end: 640
1361    samples_to_trim_at_start: 0
1362    audio_element_id: 304
1363    channel_metadatas: [
1364      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1365    ]
1366  },
1367  {
1368    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1369    samples_to_trim_at_end: 640
1370    samples_to_trim_at_start: 0
1371    audio_element_id: 305
1372    channel_metadatas: [
1373      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1374    ]
1375  },
1376  {
1377    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1378    samples_to_trim_at_end: 640
1379    samples_to_trim_at_start: 0
1380    audio_element_id: 306
1381    channel_metadatas: [
1382      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1383    ]
1384  },
1385  {
1386    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1387    samples_to_trim_at_end: 640
1388    samples_to_trim_at_start: 0
1389    audio_element_id: 307
1390    channel_metadatas: [
1391      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1392    ]
1393  },
1394  {
1395    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1396    samples_to_trim_at_end: 640
1397    samples_to_trim_at_start: 0
1398    audio_element_id: 308
1399    channel_metadatas: [
1400      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1401    ]
1402  },
1403  {
1404    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1405    samples_to_trim_at_end: 640
1406    samples_to_trim_at_start: 0
1407    audio_element_id: 309
1408    channel_metadatas: [
1409      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1410    ]
1411  },
1412  {
1413    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1414    samples_to_trim_at_end: 640
1415    samples_to_trim_at_start: 0
1416    audio_element_id: 310
1417    channel_metadatas: [
1418      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1419    ]
1420  },
1421  {
1422    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1423    samples_to_trim_at_end: 640
1424    samples_to_trim_at_start: 0
1425    audio_element_id: 311
1426    channel_metadatas: [
1427      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1428    ]
1429  },
1430  {
1431    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1432    samples_to_trim_at_end: 640
1433    samples_to_trim_at_start: 0
1434    audio_element_id: 312
1435    channel_metadatas: [
1436      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1437    ]
1438  },
1439  {
1440    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1441    samples_to_trim_at_end: 640
1442    samples_to_trim_at_start: 0
1443    audio_element_id: 313
1444    channel_metadatas: [
1445      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1446    ]
1447  },
1448  {
1449    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1450    samples_to_trim_at_end: 640
1451    samples_to_trim_at_start: 0
1452    audio_element_id: 314
1453    channel_metadatas: [
1454      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1455    ]
1456  },
1457  {
1458    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1459    samples_to_trim_at_end: 640
1460    samples_to_trim_at_start: 0
1461    audio_element_id: 315
1462    channel_metadatas: [
1463      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1464    ]
1465  },
1466  {
1467    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1468    samples_to_trim_at_end: 640
1469    samples_to_trim_at_start: 0
1470    audio_element_id: 316
1471    channel_metadatas: [
1472      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1473    ]
1474  },
1475  {
1476    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1477    samples_to_trim_at_end: 640
1478    samples_to_trim_at_start: 0
1479    audio_element_id: 317
1480    channel_metadatas: [
1481      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1482    ]
1483  },
1484  {
1485    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1486    samples_to_trim_at_end: 640
1487    samples_to_trim_at_start: 0
1488    audio_element_id: 318
1489    channel_metadatas: [
1490      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1491    ]
1492  },
1493  {
1494    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1495    samples_to_trim_at_end: 640
1496    samples_to_trim_at_start: 0
1497    audio_element_id: 319
1498    channel_metadatas: [
1499      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1500    ]
1501  },
1502  {
1503    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1504    samples_to_trim_at_end: 640
1505    samples_to_trim_at_start: 0
1506    audio_element_id: 320
1507    channel_metadatas: [
1508      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1509    ]
1510  },
1511  {
1512    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1513    samples_to_trim_at_end: 640
1514    samples_to_trim_at_start: 0
1515    audio_element_id: 321
1516    channel_metadatas: [
1517      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1518    ]
1519  },
1520  {
1521    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1522    samples_to_trim_at_end: 640
1523    samples_to_trim_at_start: 0
1524    audio_element_id: 322
1525    channel_metadatas: [
1526      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1527    ]
1528  },
1529  {
1530    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1531    samples_to_trim_at_end: 640
1532    samples_to_trim_at_start: 0
1533    audio_element_id: 323
1534    channel_metadatas: [
1535      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1536    ]
1537  },
1538  {
1539    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1540    samples_to_trim_at_end: 640
1541    samples_to_trim_at_start: 0
1542    audio_element_id: 324
1543    channel_metadatas: [
1544      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1545    ]
1546  },
1547  {
1548    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1549    samples_to_trim_at_end: 640
1550    samples_to_trim_at_start: 0
1551    audio_element_id: 325
1552    channel_metadatas: [
1553      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1554    ]
1555  },
1556  {
1557    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1558    samples_to_trim_at_end: 640
1559    samples_to_trim_at_start: 0
1560    audio_element_id: 326
1561    channel_metadatas: [
1562      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1563    ]
1564  },
1565  {
1566    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1567    samples_to_trim_at_end: 640
1568    samples_to_trim_at_start: 0
1569    audio_element_id: 327
1570    channel_metadatas: [
1571      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1572    ]
1573  },
1574  {
1575    wav_filename: "sine_1500_stereo_48khz_-15dBFS.wav"
1576    samples_to_trim_at_end: 640
1577    samples_to_trim_at_start: 0
1578    audio_element_id: 328
1579    channel_metadatas: [
1580      { channel_id: 0 channel_label: CHANNEL_LABEL_MONO }
1581    ]
1582  }
1583]
1584
1585temporal_delimiter_metadata {
1586  enable_temporal_delimiters: false
1587}
1588