Insertar Sonidos en una clase.

.h

@interface silabas_b2ViewController : UIViewController <AVAudioPlayerDelegate> {

.m

NSString *path =[NSString stringWithFormat:@"%@%@",

[[NSBundle mainBundle] resourcePath], @"/pa.wav"];

SystemSoundID sounID;

NSURL *filePath=[NSURL fileURLWithPath:path isDirectory:NO];

AudioServicesCreateSystemSoundID((CFURLRef)filePath, &sounID);

AudioServicesPlaySystemSound(sounID);