I just got a m-audio fast track pro. I have vista, 3.0 GHZ dual amd processor, 3GB RAM. I downloaded the driver for vista yesterday. I plugged in, everything seems fine except for one thing. I tried two different amp simulators, and it sounds like I've got heavy distortion on. It is not clipping, and I tried changing the latency, even to the worst setting. The only difference I heard was the latency. The cpu meter is never close to full. Also, I tried to get as clean a setting as possible, but there is still distortion. When the guitars volume knob is all the way off, it is still there. Any suggestions?