After playing youtube video from the webview -- all app music and sounds disappears. I tried to restore audio by AudioSessionInitialize() and AudioSessionSetActive() -- but it's not helps. Only one way I found to restore sounds and music -- completely re-initialize sound system including OpenAL re-initialization and reloading all sounds (for playing sounds used OpenAL via Finch engine, for music -- AVAudioPlayer). But this solution is not good because this kind of re-initializing is slow. Maybe somebody knows fastest method ? Thanks.