The audio format of the talk session, in <audioConfig>.
optional
priority: number
Priority, 0 to 31.
audioType: "adpcm" | "g711"
Audio codec.
sampleRate: number
Sample rate in Hz.
samplePrecision: number
Bits per sample.
lengthPerEncoder: number
Bytes per encoder frame.
soundTrack: "mono" | "stereo"
Channel layout.