Wow this forum looks really promising, and if so then this should be a sinch for all you guys. What im looking to build is a way to switch between two audio sources, automatically. One output is an iPod and the other is a walky-talkie, now the tricky part. I need the iPod to play straight through to a headset, but when the radio chimes in I need the iPod to be bypassed and for the radios signal to play through to the headset. Its a single ear piece so i dont need stereo capabilities. Thanks much.