Stream that can be fitted with sub-streams, which will be played in-sync. This is a stream that can be fitted with sub-streams, which will be played in-sync. The streams being at exactly the same time when play is pressed, and will end when the last of them ends. If one of the sub-streams loops, then playback will continue. Get one of the synchronized streams, by index. Get the volume of one of the synchronized streams, by index. Set one of the synchronized streams, by index. Set the volume of one of the synchronized streams, by index. Set the total amount of streams that will be played back synchronized. Maximum amount of streams that can be synchrohized.