I'm a little confused as to how to access (more than play, although that as well) sounds for a simple App I'm trying to write in Xcode.

Say I want the APP to be able to randomly play any one of 12 short piano sound samples (one for each pitch), where would I get those sounds?

It seems to me that within Xcode are only libraries of code and no actual audio files, but that's what I'm really confused about, maybe there's a way to play sounds directly from some kind of framework.

If not, any idea how else I would get those sounds?

If those are files I'd have to have on my HD, how would I go about including them in my project so that anyone with my project folder could play the sounds as well? Can I just upload sound files to Xcode?