Neuro and C4 firmware both up to date.I tried messing with C4 and my reflex last night, I’d suggest not using the 1/4” out as it won’t give you the full range of expression. When I used the 1/8” jack it worked flawlessly for me.
I would make sure that you are up to date, make sure Neuro desktop is 0.6.61 and c4 is fw 1.13. If that’s not it, I’d suggest starting a ticket in the support section of the source audio website and we can go from there.
I was using the 1/8" jack at first. With the packaged TRRS, the pedal operated as a tri-pole. All the way heel and all the way toe both resulted in 100 on the parameter, with the sweep happening in that tiny range I explained before.
Oddly.... and this is especially strange.....
The expression pedal works flawlessly with everything else. I'm using it with a Boss DD-500 and a Keeley Super Mod Workstation and it does exactly what it should with both.
OK, I think I've sorted it out. I was trying to use the 1/8" output and the 1/4" output on the same side of the expression pedal at the same time (1/8" to the C4 and the 1/4" to my Boss ES-8 for routing Exp control to other pedals).
I can now tell you, unequivocally, that does not work. At least not with my device. The second you plug anything into the 1/4" TRS jack next to the 1/8" jack, the calibration for the 1/8" goes bonkers. It can't track accurately, at heel position any parameter it's mapped to in Neuro jumps all over the place, the sweep shrinks to a tiny portion of the pedal action, etc. Pull that 1/4" back out, and it's all good again.
Using the 1/4" output on the opposite side of the pedal doesn't have the same problem.