title: AudioSessionSetProperty deprecated in iOS 7.0 so how set kAudioSessionProperty_OverrideCategoryMixWithOthers
body: <p>Need non deprecated alternate to (btw I think this is still in the current apple docs at <a href="https://developer.apple.com/library/ios/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/Cookbook/Cookbook.html#//apple_ref/doc/uid/TP40007875-CH6-SW35" rel="noreferrer">link</a>):</p>
  
  <pre><code>OSStatus propertySetError = 0;
  UInt32 allowMixing = true;
  
  propertySetError = AudioSessionSetProperty (
                         kAudioSessionProperty_OverrideCategoryMixWithOthers,  // 1
                         sizeof (allowMixing),                                 // 2
                         &amp;allowMixing                                          // 3
                     );
  </code></pre>
  
  <p>Thanks;</p>