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.

How do I test the position of mute?

(NOTE: My program has its own mute switch, but I'd like the physical switch to override that.)

Thanks!