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## PCM Audio Format Support

Model APIs

Added support for PCM formats including `pcm_s16le`, `pcm_l16`, and `pcm_raw` for both STT and STT Translate APIs.

* For most audio formats, our API automatically detects the codec
* When using PCM formats, you must explicitly specify the `input_audio_codec` parameter
* PCM files are only supported at 16kHz sample rate