I'm not quite sure how to explain what I am looking for. I am looking for an expression pedal that would allow me to mix effects with my dry signal. I suppose the pedal would be an effects loop. For example I would be able to push the expression pedal down and add more effect. If I backed off the pedal, I would get less effect. So it would mix wet/dry signal. Wet all the down, dry all the way up. Or something like that. Does this exist? Or is there a way to use a volume pedal to do this? I apologize for not being articulate about this... hopefully someone out can help. Thanks!