I got started by studying the C++ code in the sample app called Touch Fighter in one of the earliest iPhone SDKs. Michael Tyson's blog helped a lot too: http://

I got started by studying the C++ code in the sample app called Touch Fighter in one of the earliest iPhone SDKs. Michael Tyson's blog helped a lot too: http://atastypixel.com/blog/ http://atastypixel.com/blog/. This is in Swift but really good intro to audio processing on iOS: https://github.com/syedhali/AudioStreamer https://github.com/syedhali/AudioStreamer.