I am trying to play an MP3 via `AVAudioPlayer` which I thought to be fairly simple. Unfortunately, it's not quite working. Here is all I did:

* For the sake of testing, I created a new iOS application (Single
View) in Xcode.
* I added the AVFoundation framework to the project as well as the `#import
<AVFoundation/AVFoundation.h>` to the `ViewController.m`
* I added an MP3 File to the Apps 'Documents' folder.
* I changed the `ViewControllers` `viewDidLoad:` to the following:

Code:

```
- (void)viewDidLoad
{
    [super viewDidLoad];        

    NSString* recorderFilePath = [NSString stringWithFormat:@"%@/MySound.mp3", [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]];    

    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:recorderFilePath] error:nil];
    audioPlayer.numberOfLoops = 1;

    [audioPlayer play];

    //[NSThread sleepForTimeInterval:20];
}

```

Unfortunately, the audio obviously stops right after it starts playing. If I uncomment the `sleepForTimeInterval` it plays for 20 seconds and stops afterwards. This problem occurs only when compiling with ARC, otherwise, it works flawlessly.