i try to off a sound effect on my app

play method is ' [myMusic play];

```
-(void)viewDidLoad {
     BOOL soundIsOff = [defaults boolForKey:@"sound_off"];
     //the problem is here 
     //xcode compiler doesn't copile this code 
     [myMusic play] = soundIsOff;

}

```

sound code :
 '
 ///sound effect

```
 NSString * musicSonati = [[NSBundle mainBundle] pathForResource:@"sound"      ofType:@"wav"];
 myMusic = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL     fileURLWithPath:musicSonati] error:NULL];
 myMusic.delegate = self;
 myMusic.numberOfLoops = 0;

```

Shake API Code :

```
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event {

 if (event.subtype == UIEventSubtypeMotionShake)

  //Play sound :
  [myMusic play] ; 
 }
}

```