In the end, this is a playable filter. I was looking to reproduce a filter sweep that was getting close to a ping. This miRack patch was more of a found sound. All the mat modules, the Const Add Mult’s, are there to transpose the the keyboard CV by 2 semi-tones so I could play an A scale that I had going on in a Koala sampler riff that I ended up using in the demo video. The math modules also are used with CC’s from an MPK Mini knob and the joystick to adjust the portamento/glide between notes. You can have the full range of 10V CV for glide, all the way down to 0V. That adds for some fun expressiveness in your playing. Use the joystick or not.

Oh yes, it works best with higher notes as the filter is fully closed with no notes played.

If you need help figuring out how to transpose the CV, I can make a quick walk through video. Otherwise, follow the patch cables as they come from the V/Oct and CC 70 inputs.