So then it's my turn to experience this problem. I bought a second-hand JTV 69, and when I got it all tunings worked fine.
I also bought a new computer around the same time, and installed all the software I needed (Edit, Workbech, Monkey .....) . Then, after a night of charging battery
on the JTV, and bringing all the software up to date, the low E-string is useless on ALL the alternative tunings!
It's some kind of ring modulator/Pitch thing going on, it just sound terrible. All the guitarmodels works fine, no problem there.
And then I have probelm nr. 2 (not a big one) : I can only engange the models if the "modelknob" is set to Semi.
Any comments?