title: iPhone - AVAudioRecorder - how can I record to an mp3?
body: <p>I am using the AVAudioRecorder class available with the 3.0 SDK to record audio in my app.
  I am successfully able to record to a caf/aiff file. But I would like to record to an mp3.</p>
  
  <p>I tried changing some values in the settings dictionary but all I get is a blank file.</p>
  
  <ol>
  <li><p>Is it possible to record to an mp3 using AVAudioRecorder</p></li>
  <li><p>If not, how can I transfer the caf files from my app to a computer?</p></li>
  </ol>
  
  <p>Thanks.</p>