I’m a gigantic muff fan. the love the crazy harmonic madness you can get out of them. i think it would be the coolest thing if they made a new muff with a built in upper octave. it could be like an octavia, just with more control and a big muff pi circuit. there would be the standard volume, tone, and sustain knobs hat we all know and love, plus a blend knob for controlling the resonance of the octave.