title: The AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation can not work
body: <p>The method:</p>
  
  <pre><code>[[AVAudioSession sharedInstance] setActive:NO withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation error:nil]
  </code></pre>
  
  <p>does not work for resuming background music.
  My app audio session category is <code>AVAudioSessionCategoryPlayAndRecord</code>.</p>
  
  <p>Who knows what's going on？</p>