Hey! I got a serious problem!
1 1/2 years ago I've purchased a POD HD 500 & it was only kept at home.
By now, I was very happy with it, but recently the MID setup started changing its value without even touching the knob.
Please I don't know what to do & it's very annoying.
It could just be a bit dirty. Try a few things:
- rotate the knob back and forth through its full range many times, fairly quickly
- 'park' the knob at the min or max position (0% or 100%) while not using the knob
- use some contact cleaner on the knob