Expression pedal with Sub 37

The Moog Forum Subsequent 37 & Subsequent 25
1

Wondering if anyone can help here. I haven’t picked it up from the manual but can anyone tell me is it possible to send the Expression pedal to ‘pitch cv’ in but have it bend the pitch down rather than up when the pedal is pressed? Also can you set the range of the pitch modulation like you can with the mod wheel or can it only be one octave? Thanks.

2

A CP-251 would help with this:

http://www.moogmusic.com/products/moogerfoogers/cp-251-moogerfooger-control-processor

But a simpler solution might be to get a controller (box or keyboard) that has TRS Continuous Footcontroller inputs which can be remapped to various MIDI commands, including CC#s, Pitch Bend, Aftertouch, etc. There are often settings for the MIN and MAX values for Toe and Heel. Then connect it to the Sub 37 via MIDI.

MIDI Solutions makes a Controller Pedal to MIDI box that might do the trick for you:

http://www.sweetwater.com/store/detail/MIDIPC


Or, when the new Sub 37 1.1 Firmware comes out, you could use CV MAPPING to remap the PITCH CV IN jack to something like MOD2PAMT.

Then, make the SOURCE of MOD 2 be CONST ON. Use the CONTROLLERS menu parameter CTRL4 AMT to set the maximum bend. (The higher the CTRL4 AMT value, the less you will bend.)

To reverse the pedal’s polarity, you could get a pedal that already has that ability:

http://www.sweetwater.com/store/detail/DualExpPedal

http://www.sweetwater.com/store/detail/ExpressionPED

Or, perhaps you could rewire the potentiometer in your pedal to work in reverse.

3

Thanks for the tips Dan, I’ll look into it.

4

Sounds like a good diy arduino project. Take an analog.read of any expression pedal and map it to 0- 127 of a CC# of your preference- serial out to a midi out jack. Simple stuff

5

Add Toe Value, Heel Value, Offset, and Curve parameters and you’d have a staggeringly useful performance tool!

Allow Toe values and Heel values to be any value such that you could reverse the direction of the pedal.

Adding a Slew Rate (glide between values) would also be musically useful (especially for Filter or Pitch Sweeps).

6

That could be a little complicated to try to accomplish all at once. As long as we are talking DIY project, I would recommend starting w/ something simple like getting it to work w/ one parameter, then splitting heel and toe, then slew rate, etc. offset and curve may be tough and would involve some math… oof!

Coming up w/ an elegant interface that would allow the user to easily change all those settings might be the biggest challenge.