title: AVAudioPlayer initialization error
body: <p>I initialize my AVAudioPlayer instance like:</p>
  
  <pre><code>[self.audioPlayer initWithContentsOfURL:url error:&amp;err];
  </code></pre>
  
  <p>url contains the path of an .m4a file</p>
  
  <p>The following error is displayed in the console when this line is called :"<em>Error Domain=NSOSStatusErrorDomain Code=1685348671 "Operation could not be completed. (OSStatus error 1685348671.)</em>"</p>
  
  <p>What is the reason for this error?</p>