USB Audio Buzz

Right, have no idea why this is happening perhaps you lot can help

It's quite simple, i use a Plantronics USB headset (See here) The headset works perfect right up until i plug in a Xbox 360 controller (Guitar hero and normal) it makes this amazingly annoying buzzing sound in and out (speakers and microphone)

I've tried to resolve it and i can't figure out how to nothing works, you should note that the onboard sound card works perfect with xbox 360 controllers just the usb audio's as i have a usb audio guitar effects pedal which does the same when i plug that in while an xbox 360 controller is in there...

DXDiag: HERE
Recording: HERE

Any help will be appreciated!

 

It's obviously some type of conflict. Have you talked to the XBox people about the problem?

 

I had a look on Microsoft's site and they charge for support queries.... i dislike that idea...