Recording / playback

Record a call to disk or play a file into it. Both are client.Media operations that return a controllable session.

Record a call

IRecordingSession rec = await client.Media.StartCallRecordingAsync(call, "call.wav");

await rec.PauseAsync();
await rec.ResumeAsync();
await rec.StopAsync();      // finalizes the file

StartConferenceRecordingAsync records a bridged conference instead of a single leg.

Play a file into a call

IPlaybackSession play = await client.Media.StartCallPlaybackAsync(call, "prompt.wav");

await play.PauseAsync();
await play.ResumeAsync();
await play.StopAsync();

StartConferencePlaybackAsync plays into a conference.

Formats

WAV and MP3 are supported for playback; recording writes WAV. The session decodes/encodes against the call's negotiated audio format for you.

MP3 caveat: MP3 playback expects raw MPEG frames from byte 0. Files with an ID3v2 tag (the common case) or VBR headers currently fail rather than resynchronizing to the next frame. Strip ID3 tags first, or use WAV, until this is improved (issue tracker).

Lifecycle notes

• Always StopAsync a recording to flush and close the file cleanly — a dropped session may leave the file unfinalized.
• Recording and playback compose with a media tap: you can record while a bot injects audio on the same call.
• Sessions are tied to the call; ending the call ends the session.