Sound Programming Topics for Cocoa

http://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/Sound/Sound.pdf 

// Setting

NSBundle *mainBundle = [NSBundle mainBundle];

NSSound *sound = [[NSSound alloc] initWithContentsOfURL:[mainBundle pathForResource:@"sound" of Type:@"wav"] byReference:NO]

// play

[sound play];

// stop

[sound stop];

//infinity loops

sound.loops = YES;