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i'm working on little game, and i've got problem with background music. I use AVAudioPlayer to play loop music. It's look like below:

NSString *path = [[NSBundle mainBundle] pathForResource:@"background" ofType:@"ogg"];
NSError *error;

AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL URLWithString:path] error:&error];

NSLog(@"%@", [error description]);

[player setNumberOfLoops:-1];
player.delegate = self;
[player play];

I've got in Supproting Files file background.ogg, background.mp3, background.wav and no one plays. What is wrong with it?

And when i use NSLog to print description error i've got:

Error Domain=NSOSStatusErrorDomain Code=1954115647 "The operation couldn’t be completed. (OSStatus error 1954115647.)"

Please help.

Tomasz Szulc
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    This is the code for `kAudioFileUnsupportedFileTypeError`. But iOS can definitely play MP3 and WAV files, at most it can't handle OGG ones. I suspect the problem is that you should use `+ [NSURL fileURLWithPath:]` instead of `URLWithString:` since a file path itself is not a valid URL. –  Dec 29 '12 at 14:55
  • @H2CO3, `error = (null)` when i use .mp3 and `+ [NSURL fileURLWithPath:]` but still no sounds. – Tomasz Szulc Dec 29 '12 at 15:02

2 Answers2

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Some times,just because your audio file's quality is not match what it need,such as sampling rate.Please check up whether your audio sampling rate is lower than 24kHz. I have tested some audio,And I found that when the audio sampling rate is higher than 44kHz,it work great, but if it is lower than 44kHz & higher than 22kHz, the AudioToolbox can't play the sounds first while AVAudioPlayer can work some times. And if it is lower than 22kHz both them will can't play these audio files.(these audio's file format which I tested just "m4a","mp3","wav")

By the way,If you want to convert the low sampling rate audio to 44kHz "m4a" file use itunes,it also can't work.Don't waste your time on this.

Summerring
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That was so easy. There is one more thing. When you use e.g NSTimer you must ivalidate it in some place. When you use AVAudioPlayer you have to stop it in some place.

[player stop];
Tomasz Szulc
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