title: How to record using AVAudioRecorder without the .caf container?
body: <p>I am using a AVAudioRecorder instance to record with the setting for <code>AVFormatIDKey</code>  set to <code>kAudioFormatMPEG4AAC</code>.  It records the audio in AAC format but a <code>.caf</code> audio container packages the audio file. (I can see the caff header in the recorder file).
  How do I record so that the caff container is not there but in pure m4a format so that I can use the files across platforms.</p>