A stretch of the current segment that has played.
Reported once the audio can no longer be discarded, so it is never revised.
How much of it played, in milliseconds
Where it starts in the audio captured for the current segment, in milliseconds
The timestamp (Date.now()) at which this stretch began to play
A stretch of the current segment that has played.
Reported once the audio can no longer be discarded, so it is never revised.