Always 1.
Always 'PCM_S16LE'.
OptionalmaxPublish queue bound, in 10 ms chunks. Defaults to 50 (~500 ms).
A LocalAudioTrack.write is accepted only if it fits whole within
this bound; otherwise nothing is buffered and write() returns false.
A single write() larger than the bound can never fit and is always
rejected, so size this to the largest burst you intend to publish.
Always 48000. WebRTC audio is 48 kHz internally.
Always 'raw'.
Raw-frame source configuration for a LocalAudioTrack.