has anyone had any problems using the edirol ua-1x to get audio into the computer from a real insturment? all my recordings have a popping/clicking noise in the background which is not the metronome. while i record the meter doesn't clip and i've tried plugging the guitar straight into the edirol as well as going from an amp output and a mixer but they all give that background noise. also i've tried playing with the hi/low switch on the edirol but that doesn't do anything to help. my computer is a 600mhz i book with 640 ram running 10.2.8 if that helps in tracking down the problem. please help if you can.