not sure exactly how to phrase this, but is this voltage conrolled pedal 0 to +12 volts (like a one octave shift) or is it more like… say a pitch wheel, where zero is in the middle, with 1 octave up and 1 octave down? any info is appreciated
The Moog expression pedal is nothing more than a foot-controlled potentiometer (pot). At the heel-down position, it acts like a pot turned fully CCW (passing no signal), and at the toe-up position it’s like turning the pot fully CW (passing the full signal.).
Each red jack on the Voyager’s back panel provides +5V, so plugging the expression pedal into these jacks means that the expression pedal can adjust the signal from 0V to +5V - in other words, a positive signal only.
Since some of the red jacks accept both positive and negative CV’s, the use of an expression pedal in these jacks will only provide half the range, again because the expression pedal will only output a positive voltage. This means, for example, that the expression pedal will only produce a Pitch increase as you go from heel-down to toe-up. Retuning to heel-down, you will arrive back at the original pitch.
Hope this helps.
Greg
I do have one question though…does the expression pedal use a stereo 1/4" plug and utilize all 3 terminals of the pot or does it use a mono plug and just utilize the tap and one side of the pot?
It’s a TRS plug that uses all three terminals. The tip connects to the pot wiper.
Mine’s actually an Ensoniq pedal, labeled Model CVP-1, but looks identical to the Moog Expression pedal. Made overseas, I think. Has a 10K pot. Plastic construction all around, but works fine in a project studio environment. Probably wouldn’t survive the riggers of the road, though.
Greg