AudioServicesPlaySystemSound sound not audible when called from IBAction method

Question

I'm having a problem with AudioServicesPlaySystemSound in my iOS app.

I have a method defined to play a system sound. When I call the method from viewDidLoad, I can hear the sound play, but when I call it from a button handler, I do not hear the sound play.

Here's the code from my view controller:

SystemSoundID startSound = 0;

-(void)playStartSound
{        
    AudioServicesPlaySystemSound(startSound);
}

-(void)viewDidLoad 
{           
    NSURL *urlStart = [[NSBundle mainBundle] URLForResource:@"Beep" withExtension:@"wav"];
    AudioServicesCreateSystemSoundID((CFURLRef)urlStart, &startSound);

    [self playStartSound];    

    [super viewDidLoad];
}

- (IBAction)start:(id)sender
{
    [self playStartSound];
}

The IBAction method is associated with a button. When I select the button, the playStartSound method gets called, but the sound is not audible.

The system sound is not disposed of with AudioServicesDisposeSystemSoundID until the dealloc method is called.

I've tried calling AudioServicesCreateSystemSoundID from within playStartSound, but it didn't make any difference.

The app also uses AV Foundation, Media Player, Core Media, Core Video, and Core Location. I'm wondering if one of these might be interfering with AudioToolbox?

UPDATE: I just put together a simple app that just contains the above code and a button and the sound plays just fine when I select the button.

So then I removed all the video capture code from my controller and now the audio plays fine.

Is that actually how you're declaring your SystemSoundID variable? — Ell Neal, Jan 31 '13 at 13:48
I originally had it as a class member, but moved it to a global to see if it made any difference. It didn't. — Avalanchis, Jan 31 '13 at 13:57
http://stackoverflow.com/questions/13246026/mpavcontroller-not-enough-buffered-to-keep-up — Rajneesh071, Jan 31 '13 at 13:59

score 4 · Answer 1 · answered Jan 31 '13 at 21:43

4

This was not working because I had an active video capture session in my application.

AudioServicesPlaySystemSound will not play when there is an active video capture session.

answered Jan 31 '13 at 21:43

Avalanchis

4,500
3
39
48

is there any way to play a sound while recording video? – Muruganandham K Jan 08 '14 at 14:21

score 0 · Answer 2 · edited Jan 01 '14 at 06:31

0

   NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"7777" ofType:@"mp3"];
   SystemSoundID soundID;
   AudioServicesCreateSystemSoundID((__bridge CFURLRef)([NSURL fileURLWithPath: soundPath]), &soundID);
   AudioServicesPlaySystemSound (soundID);

Hey try like that it will play

edited Jan 01 '14 at 06:31

Ahmed Z.

2,329
23
52

answered Jan 31 '13 at 14:27

Nagababu

1

AudioServicesPlaySystemSound sound not audible when called from IBAction method

2 Answers2