Don,
The college is updating their system. My email should be back up and running on wednesday. The noise that I was hearing was controlable from the X1's master volume control. I spent 10 years repairing organs and amps and it wasn't a bad ground type of sound. A bad cable or a bad ground would hum all the time regardless of the master volume on the X1. This wasn't a hum. I need to do some further checking at home. Maybe it was some piece of equipment in the building. Talk to you later.

Tom