QuickTime Music Architecture

Tune Player Component

The tune player component can accept entire sequences of musical notes and play them start to finish, asynchronously, with no further need for application intervention. It can also play portions of a sequence. An additional sequence or sequence section may be queued-up while one is currently being played. Queuing sequences provides a seamless way to transition between sections.

The tune player negotiates with the note allocator to determine which music component to use and allocates the necessary note channels. The tune player handles all aspects of timing, as defined by the sequence of music events. For more information about music events and the event sequence that is required to produce music in a QuickTime movie track, see the section "About QuickTime Music Events" .

The tune player also provides services to set the volume and to stop and restart an active sequence.

If your application simply wants to play background music, it may be easier to use the QuickTime Movie Toolbox, rather than call the tune player directly.