title: What's the difference between the Apple audio frameworks?
body: <p>In the documentation I see several Apple frameworks for audio. All of them seem to be targeted at playing and recording audio. So I wonder what the big differences are between these?</p>
  <ul>
  <li>Audio Toolbox</li>
  <li>Audio Unit</li>
  <li>AV Foundation</li>
  <li>Core Audio</li>
  </ul>
  <p>Did I miss a guide that gives a good overview of all these?</p>