Hi Mike, good to see you here.
I tried to reapply firmware 2.0 but that did not cure the problem. I also noticed before rolling it back that if I unplugged it and powered down that it would not buzz when I turned it back on until I entered the Acoustic bank whereupon the buzz would come back immediately and remain for all settings until powered down. So I rolled it back to firmware 1.90 and that seems to have cured the issue. It appears there is some glitch that my variax is experiencing with the 2.0 firmware.
I intend to give it more of a work out tomorrow to see if this observation is accurate. Thanks for your help, and again, great to see you here.