title: CoreAudio tempo change (iOS)
body: <p>I'm very new to audio programming, but I know this must be possible. (This is an iOS/iPhone related question).</p>
  
  <p>How would I go about changing the tempo of a loaded audio file without changing the pitch, and then playing it back?</p>
  
  <p>I think I need to delve into the CoreAudio framework, but I'm not sure where to begin.</p>
  
  <p>If anyone could let me know what classes I need to look at, or the general process involved, that would help me get started and I'd really appreciate it!</p>
  
  <p>Cheers!</p>