Intellijel Designs µVCF state variable filter.
This is another great david dixon filter design that has been on the workbench for a while. it is a very clean and precise filter that also doubles as an excellent sine vco.
• 6 hp
• Skiff friendly
• Low pass (lpf) 2-pole output, high pass (hpf) 2-pole output and bandpass (bpf) 1-pole output
• FM1 input acts as 1v/oct when full cw tracks very well over 4+ octaves
• FM2 input has a bipolar attenuator
• At full q you get very low distortion sinewaves with a range of 2hz to 20khz