It’d be easy to overlook the Harmadillo algorithm as envelope triggered filter. Not really ‘synthy’, but featuring a distinct, squeaky-clean sweep. It can have elements of both the Up & DOWN directions in a Mutron, in the same filter sweep. Really responsive to playing technique.
The only parameters required here are the X-OVER, X-OVERLAP, and ENV X-OVER controls. RATE, SHAPE, ENV DEPTH, and ENV RATE lie ‘hidden’ in the background. (The DEPTH control at 0 defeats the tremolo section).
I assigned that to an expression pedal, to bring in some vibrato-like modulation. The GRAPH VIEW image below shows the expression pedal at full toe (DEPTH to 75).
