AudioServicesPlaySystemSound not playing sounds

Question

I am playing a small .wav file using the AudioToolBox.

AudioServicesPlaySystemSound (soundFileObject);

But sometimes it is not playing.

Answer 1

If you're in the Simulator, make sure that in System Prefrences → Sound, that "Play user interface sound effects" is not turned off. If you're on the device, check that the ringer switch is not set to silent.