iphone - Sound on simulator but not device

Question

I'm using the following to play an m4a file:

NSString *path = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent: fileName];
SystemSoundID soundID;
NSURL *filePath = [NSURL fileURLWithPath:path isDirectory:NO];
AudioServicesCreateSystemSoundID((CFURLRef)filePath, &soundID);
AudioServicesPlaySystemSound(soundID);

It works fine on the simulator but I hear nothing on the device. Sounds files I'm using all stay in the bundle. Here is what filePath looks like from the device:

file://localhost/var/mobile/Applications/418945F3-3711-4B4D-BC65-0D78993C77FB/African%20Adventure.app/Switch%201.m4a

Is there an issue with the file path or any thing different I need to do for the device?

Answer 1

Just as a sidenote - I was having the exact same problem and spent probably close to an hour on converting files to the correct format, etc.. Yet the problem was the "mute" switch on the iPad. So even though the volume was up, and I could hear other sounds on the iPad, because the mute switch was turned on, it wasn't playing system sounds.

To add to the confusion, this app uses text-to-speech and the volume coming from the dictation was perfectly fine, it was only the sounds coming from AudioServicesPlaySystemSound() that weren't being played.