Voice 6 does not seem to be fully muting when I set it to "off" in the pan menu. It bleeds through a little bit. I wonder if the pan control that mutes it could be related to the random clicking I'm hearing (which can get pretty loud some times actually!)
Are there any IC's I could try re-seating or even replacing related to the pan/off controls? How about anything to check related to the individual voice outputs?