Are there any pedals that have all of their parameters able to be affected by a USB-connected device? I do not mean presets, like TCE's Toneprints. I also do not mean pedals that have only one (or even several but only one-at-a-time) parameter controllable by an expression pedal. Is there such a pedal? If not, what (within the scope of this site) would it take to build such a pedal, beyond the basics?