Just modded my Vox Wah into an expression pedal. However it is not using the full range and most of the action happens at the last few "toe" centimeters.
I tried to go into system settings to calibrate but I'm not even sure how to use the calibration feature. Nothing happens/changes if I click and/or hold the soft-button:
How is it supposed to work, what should I be seeing, and why isn't it working
Any help appreciated.