In my app the user plays a sound by pressing a button. There are several buttons which can be played simultaneously. The sounds are played using AVAudioPlayer instances. I w
Hope it helps, at least to look for something else.
I'm having the same issue here, I'm trying to record a mix of different sounds played at different times with a main track playing, what I found is that AVAudioRecorder records only from the mic, so it would work.
What I found, still have to read doc and test it, is the Audio Converter Services, I think that may work, but I have just read a few lines.
Once again, sorry to tell you, but you're looking the wrong way, I hope my answer helps