Supporting Audio Format

Audio Format	Description
16k_int16	The default audio format. The Signed 16 bit, 16,000, or 16KHz audio sampling rate in the wav format
16k_uint8	The Unsigned 8 bit, 16,000, or 16KHz audio sampling rate in the wav format
8k_int16	The Signed 16 bit, 8,000, or 8KHz audio sampling rate in the wav format.
8k_uint8	The Unsigned 8 bit, 8,000, or 8KHz audio sampling rate in the wav format.
opus_16k	Opus encoded audio frames. The sampling rate must be 16KHz
opus_8k	Opus encoded audio frames. The sampling rate must be 8KHz
ogg_opus	Opus encoded audio frames in the Ogg container
16k_ulaw	The µ-Law audio frames. The sampling rate must be 16KHz
8k_ulaw	The µ-Law audio frames. The sampling rate must be 8KHz