Is it possible to do mixing of audio files "on the fly"? An example I
have in mind would be mixing 2 or more channels (with an upper limit
of say, 8) for simultaneous playback; does the QuickTime API support
I guess the mpeg 4 standard can allow up to 64 channel audio (is that
practice I think we (university types) usually work with fewer
channels than that;
any guidance here is much appreciated, thanks!!
QuickTime mixes all the audio tracks in a movie as it plays the
movie. If you've got all the data in a single multi-channel file,
whose filetype is supported for import, then that's all you need.
Otherwise, you can construct a movie containing the data from all the
audio files you want to mix, by opening those files programmatically
and copying tracks into a destination movie. [You need only copy by
reference, which is very inexpensive, since the media isn't actually
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