I've read through just about every post on this forum I could find about adding EXP input to pedals, lots of good info.
A lot of posts refer to this:
http://www.geofex.com/Article_Folders/xprnped.htm (http://www.geofex.com/Article_Folders/xprnped.htm)
The Stereo Polychorus' Rate control looks like it would fit the exception example (LED/LDR) of a pot that is a voltage divider but one of the terminals is not attached to ground. However, there's no description on how to do it.
Here's a picture of the circuit as reversed for a DIY version of the pedal.
(https://i.postimg.cc/14GrKyF3/Capture.png) (https://postimg.cc/14GrKyF3)
Has anyone done this type of mod successfully w/ the LED/LDR? Could it be done w/ just the switched jack? AnalogMAN does this mod, not sure how he does it.