Seemingly random file corruption using AVAudioRecorder (Sometimes the file can't be played back) - iOS

Question

In an app I\'m currently developing, I\'ve more or less hit a brick wall. In the application you can enter a view which lists all locally saved audio files in a standard table v

Answer 1

Note: Since the OP is inactive for some days and I guess this question should be answered for public's future reference, thus I post this answer.

The AVAudioSession has to be obtained before start recording.

AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
[audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
if(err){
   NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
   return;
}
err = nil;
[audioSession setActive:YES error:&err];
if(err){
   NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
   return;
}

Reference: https://stackoverflow.com/a/9706731/188331