libpd/libpd — comment on commit 01492deb9cdaae5acf0c2d009c13f3fc7d423d1c
File: objc/PdAudioController.m line 84
By reakinator:

This is the wrong category for background audio, it should be AVAudioSessionCategoryPlayback (see http://developer.apple.com/library/ios/#qa/qa1668/_index.html). Also, the mixingEnabled flag is supposed to be used to set the kAudioSessionProperty_OverrideCategoryMixWithOthers property. This is how it is done in the master branch, I'm not sure why you took it out, especially without testing the results.