Removing Core Audio driver

I've recently tried to install the digidesign Mbox to run with garageband, but had no luck. I installed the appropriate Core Audio driver with no problem, but now I can't get it off of my system. I've ran the unistall that came with the download but it still is showing up in my activity monitor as "coreaudiod" and is slightly slowing down my machine. Any thoughts on how to completely remove this driver from my system? Thanks!