title: AVAudioPlayer drops frame rate
body: <p>I'm playing short aiff sounds using the AVAudioPlayer class while doing animations. Unfortunately, every time a sound plays the frame rate of the animation drops. It seems this can be fixed by setting the AVAudioSession category to <code>AVAudioSessionCategorySoloAmbient</code>, but despite having done this, I'm still seeing a lot of frame rate drops.</p>
  
  <p>I'm settings the AVAUdioSession category in the app delegate like this:</p>
  
  <pre><code>NSError *setCategoryError = nil;
  BOOL success = [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategorySoloAmbient error: &amp;setCategoryError];
  </code></pre>
  
  <p>Am I doing something wrong here?</p>