title: AudioQueueStart fails after a phone call in iphone4
body: <p>i'm trying to record from an app with AudioQueue in ios6 and iphone4, i've found that when last thing i've done with the phone is a call, then AudioQueueStart fails with (2003329396), and can't start input queue anymore. </p>
  
  <p>Without the previous phone call, AudioQueueStart works well, multiple times.</p>
  
  <p>This occurs in that way:</p>
  
  <pre><code>I do a phone call.
  Start my app.
  Creating unique audio session...
  Creating session property listener...
  Activating session...
  Setting audio category... (Record)
  Property listener received... 1919902568 kAudioSessionProperty_AudioRouteChange
  Reason is: kAudioSessionRouteChangeReason_CategoryChange 
  Inputs avaliable (here Im looking in route dictionary information, if i have inputs     information in new route )
  Creating new Queue Input...
  Allocate/Enqueue queue buffers...
  Start Record Queue...
  OSStatus ERROR (2003329396) 
  </code></pre>
  
  <p>This seems not affect iphone4s.</p>
  
  <p>Is there any normal way to recover the ability to use AudioQueueStart for an input queue, in this case? </p>
  
  <p>Thanks, sorry for my format...</p>