Hi all. I think I've narrowed it down to one of these two pedals for an envelope filter. The MF-101 is the favorite, as I see it, because it does envelope AND has CV inputs for wah with expression pedal(s). But the Funk-a-Duck has up AND down envelopes and you can control the speed of the envelope. Which has a better sound and vibe to it? And which would is the most useful? I guess I haven't completely ruled out the Mojohand pedal or the Emma pedal. Anything else I should consider? Cheers.