Well, I have two basic requirements;
1) the app can play iPod music
2) the app can play iPod music and the app’s own wav files in the background.
And the only problem I have right now is that AirPlay doesn’t like an audio stream with 44.1 and 16k audio in it at the same time.
I’m not sure how I would go about fixing that, even with a completely different way of playing audio files, without changing the hertz of one or the other of the kinds of files I’m playing.