I'm sure there has to be something I'm overlooking, but idk what it is. I'm using a source audio expression bc that's what I have laying abouts. When I'm trying to dial in a wah, I'll have the heel down and start the throw around half way thru it'll get to the fully open or treble high (don't know how else to describe it) then the rest of the throw it closes so toe down gets you the same sound as heel down. Any help is appreciated..