When I Skype or voice chat with anyone, using any voice chat program, they say they can a hear a ring or buzzing coming from my microphone. I sometimes can fix the ring by changing the settings in my control panel, but then my voice starts sounding like a chipmunk (though the ringing leaves). I'm attributing this problem to a bad driver, so I'm wondering if anyone here knows how I could fix this issue; installing a new driver, updating my existing driver, etc?
My computer is a Sony VAIO VGN-FW351J running Windows Vista. The microphone driver that I'm using is Realtek High Definition Audio 126.96.36.19915.