title: Load .m4a file from disk into NSData object - iOS
body: <p>I recorded the users voice with an <code>AVAudioRecorder</code> and saved it as a .m4a file in the documents folder. When I am trying to load the .m4a file into an <code>NSData</code>object, the object is nil.<br>
  The .m4a file contains sound and the used file path is correct.<br>
  I am using the following line to load the .m4a file:    </p>
  
  <pre><code>let soundData = NSFileManager.defaultManager().contentsAtPath(soundPath)
  println("\(soundData)") // prints nil  
  </code></pre>