title: Volume issue - AVAudioPlayer mixed with AudioServices System Sound
body: <p>I've big problem with handling sounds in my game. I'm using AVAudioPlayer for BG music and AudioServices system sound for short sound FX. There's issue with volume. </p>
  
  <p>Changing volume down in game affects background music and SFX volume. If it's muted, all is muted. But volume up affects correctly only background music but SFX goes to it's maximum regarding of main Sound Effects Volume setting. If sound effects volume is set to 0, I got no SFX but music is playing correctly. Hope it's clear.</p>
  
  <p>How can I adjust volume of both of them in game??</p>
  
  <p>Please help me becuase deadline is coming :/</p>