Where are the sound files inside XCode?

Are the sound files that are used inside the Unity IDE somehow compiled into libiPhone-lib.a inside XCode? I’m looking for a way to access the audio files inside XCode/Objective-C. As far as I can tell by looking at the exported XCode project, there are no sound files or other resources anywhere to be seen.

All assets are compiled into .assets files. They aren’t available as separate files in a build.