Multimode filter based on the filters of the MS20. Individual LPF and HPF, when combined also give BPF.

This filter also has a built in VCA.  Add audio and an envelope and you've got a complete monosynth.

Controls: HPF cut-off, HPF resonance, LPF cut-off, LPF resonance, Output level.

In and Outs:
Audio in x2.
HPF cut-off CV x2.
LPF cut-off CV x2.
VCA output.