Chas, what model is your Roland pedal? Mine is either the DP-8 or the DP-10. I used to order a lot of Roland products when a friend was a dealer. It might have come with my VP770. I assumed it had a polarity switch, but I found out that the switch toggles between Continuous and Switch; it supports half damper control. So that's reason it didn't work with the NC2X. Also, the NC2x doesn't seem to recognize the right polarity (when it starts with the damper pedal plugged in) and it has no menu to change the polarity. All my Boss foot switches with a polarity switch, of course, do work with the NC2x. No, biggie, but I just need to make sure that I do not take the Roland DP10 to gigs with the NC2x.

Chris