is this what you have?
http://www.amazon.com/Microsoft-68A-00001-LifeCam...3000/dp/B000EVM5DK
i had a camera with built in audio... my usb slots wernt fast enough to handle audio and webcam if i had other things like infrared plugged into the usbs also... maybe the usbs arent fast enough to transfer video and audio? thats what i had but that was an old pc... times should have moved on!
/ 
![[Image: lost7ru.gif]](http://img518.imageshack.us/img518/6144/lost7ru.gif)
