I've got a Dark Matter distortion pedal that I simply can't tame. I want to be able to use the volume pedal (a Fender FVP-1 passive volume pedal) in the chain before the the DM but when the DM is engaged I can't get a smooth swell; when it's not engaged all is well. When engaged there's a point where it just pops in. It's my understanding that as the volume tone the tone should start relatively clean and increase smoothly as the VP is swept to full volume. The chain is: GTR > Keeley 4 Knob Comp > Fender VP > Empress ParaEQ > TC Dark Matter Distortion > time based FX Also, this is from the Dark Matter manual: "Touch sensitive – control tone and distortion level by pick attack and your guitars volume knob" What am I doing wrong?