title: How to programmatically sense the iPhone mute switch?
body: <p>I can't seem to find in the SDK how to programatically sense the mute button/switch on the iPhone.  When my app plays background music, it responds properly to the volume button without me having any code to follow that but, when I use the mute switch, it just keeps playing away.</p>
  
  <p>How do I test the position of mute?</p>
  
  <p>(NOTE: My program has its own mute switch, but I'd like the physical switch to override that.)</p>