title: AudioQueue in-memory playback example
body: <p>Does anybody know of any examples using AudioQueue that play from an in-memory source?</p>
  
  <p>All the examples I can find play from files (using AudioFileReadPackets) but in my particular case I am generating the data myself in realtime so ideally, I want to enqueue the data myself rather than sucking it out of a file using the callback.</p>
  
  <p>Any help much appreciated.</p>