Does this exist: A wah type pedal that you would line up after a distortion or synth pedal that doesn't wah, but controls the saturation (i guess) of the previous effects? So you could go from wet to dry and vice versa. It would go like this: Bass--->Synth/Distortion---->Special Pedal----->Amp. Does this exist? If not, any ideas on how to make one? Thanks. Godspeed. Ethan.