| Audio Format | Description |
|---|---|
| 16k_int16 | Default format: Signed 16-bit, 16KHz sampling rate in WAV format |
| 16k_uint8 | Unsigned 8-bit, 16KHz sampling rate in WAV format |
| 8k_int16 | Signed 16-bit, 8KHz sampling rate in WAV format |
| 8k_uint8 | Unsigned 8-bit, 8KHz sampling rate in WAV format |
| opus_16k | Opus-encoded audio frames, 16KHz sampling rate |
| opus_8k | Opus-encoded audio frames, 8KHz sampling rate |
| ogg_opus | Opus-encoded audio frames in Ogg container |
| 16k_ulaw | µ-Law audio frames, 16KHz sampling rate |
| 8k_ulaw | µ-Law audio frames, 8KHz sampling rate |