title: Turn iOS Device into AirPlay Speaker
body: <p>I'm fiddling with an app, and I'm also aware that apps made by developers that allow an iOS Device to receive an audio stream from another iOS Device or iTunes.  So I'd like to implement it and possibly find a method within Apple's guidelines, allowing audio to be streamed.  I've tried looking for everything, but I can't find where to start.  Any ideas, a place to start, maybe even a point of direction would be great.</p>