title: AVAudioSessionCategoryPlayAndRecord with Airplay
body: <p>My app uses the microphone and outputs audio, so I am setting my Audio Session to the Play and Record Category, but this seems to disable Airplay. If I set the category to Play, Airplay works fine with my output (but obviously the input doesn't work).</p>
  
  <p>I've tried overriding the output route to speaker, in case it needed that to output over Airplay, but no joy.</p>
  
  <p>Any ideas?</p>