You “could” solder in a TRS input jack in place of the pot…
An easier and not permanent way would be to have the wet (SYNTH) signal go out to a volume pedal then back to amp then have them rejoin using a Y cable or separate inputs in a pedal or the amp?
I just bought a brand new canyon from the big box giant and they didn’t include the manual, box or Power Supply. They knocked 10 bucks off the price and I figured I didn’t need the box or paperwork but now I’m stuck with a pedal that won’t work in my boards and doesn’t seem to work properly on its own with a boss psa, Ibanez 9v, or my one spot. It works but sounds like it needs more power or straining when tapping tempo changes or looping.
Can I get a power adaptor or should I return this? Wish EHX would educate the dealers about this issue. When you buy a little pedal like that, you kind of expect it to work in a chain.