have recently begun to notice a problem with my UniVibe setting. When I am playing in manual mode and have UVibe set to lower speed with medium intensity...it functions fine. Then without any provocation, the speed jumps to max speed. If I tweek the speed knob...it goes back to slower, but then will later revert to fulll speed. I have tried factory reset, and still happens. Everything else is fine. Valvetronix gremlins or is there an explanation?
And I guarantee that this only happens with your VC12 connected, & not with the amp on it's own, doesn't it!?
This happened to me when I first got my rig & I thought something was wrong - so I spoke with Korg/Vox & Mitch Colby gave me the fix straight from the Vox techies.
The reason is the calibration of the expression pedal on the VC12. It's very sensitive and when you're playing, the slightest nudge/jump/vibration can move the pedal sufficiently for it to kick-in - and with the pedal down, you get max fast uni-vibe!
The fix is easy. Re-set the expression pedal calibration - but instead of pushing the pedal all the way down as per the manual, just nudge the pedal back ever so slightly so that there's a tiny amount of play. It will make no effect to the pedals range or function, but you'll never have the problem again!
To understand what's happening better, think of it this way - fully 'down' is 100 where there's no tolerance to movement - nudged back a tad to 98 gives some play - so if the pedal moves to 99 previously it would activate the pedal position (which over-rides the V'x manual settings), but by setting the pedal range from 1-98 the pedal's no longer 'activated' by external jumps/vibrations when it moves from 100 to 99. The numbers are illustrative only, but you get the idea.
Rich
