OptionalbitrateBitrate in kbps.
OptionalchannelsChannel count.
OptionalcodecCodec name as foobar2000 reports it, or unknown.
OptionaldurationTrack length in seconds.
A track is playing or paused; the other fields are present only then.
OptionalsampleSample rate in Hz.
Always true here; a failed call resolves with ApiFailure instead.
Successful response from
audio.getStreamInfo.