PFRANCOJR1If you are still looking for a MIDI expression pedal (MIDI out), there is this one:
https://beatbars.com/en/midi-expression-pedal.htmlIf you are looking for an expression pedal (control voltage), there are many to choose from but compatibility could be an issue (as it was for me, see below)!
Lynx1975Your problems with the Zoom fp02m are almost exactly what I experience with my Yamaha FC7. I have also noticed that after almost 7 months no one has been able to answer your question about recommended resistance values.
My observations using the Yamaha FC7 with an Axe I/O Solo:
The Yamaha FC7 resistance varies from about 30 ohms to 50k ohms and is a logarithmic taper.
I downloaded the manual for the Axe I/O Solo before I bought the unit, but no mention in the manual about resistance values or whether a logarithmic taper is supported. The image provided in the manual of the Controller tab shows a setting of LINEAR with a drop down menu indicated but no mention of what else is available with this menu. I figured that since they show LINEAR that another setting would be LOGARITHMIC, alas, such was not the case. Besides LINEAR the other settings available are EXPANDED and COMPRESSED.
Loading a wah pedal into Amplitube results in the following:
LINEAR - the wah values range from 7.9% (FC7 at minimum) to 100.0% (FC7 at 1/2 way to maximum).
EXPANDED - the wah values range from 1.6% (FC7 at minimum) to 100.0% (FC7 at 1/2 way to maximum).
COMPRESSED - the wah values range from 28.3% (FC7 at minimum) to 100.0% (FC7 at 1/2 way to maximum).
On my other computer which has a PCI bus audio interface connected to a Yamaha CS1x with MIDI cables and the FC7 plugged into the CS1x Foot Controller jack:
The Amplitube wah pedals values range from 0.0% (FC7 at minimum) to 100.0% (FC7 at maximum); so the problem is not with the FC7 pedal but with a lack of settings the Axe I/O Solo has provided in the Controller tab.