VCF based on ARP 4023
https://www.nonlinearcircuits.com/modules/serious-filter
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NLC Serious Filter8 hp, White PanelReverse power protection installed, comes with power cablesmoke free studioFurther information from nonlinearcircuits:Serious? well... it is based on the Arp4023 and will make the room shake or scream like nails on chalkboard and everything in between. Makes a nice quadrature oscillator too.InputsIN1: Input 1 - can be attenuated via IN 1 Pot IN2: Second input (no attenuation) CV1: Frequency control voltage - can be attenuated via CV 1 Pot CV2: Frequency control voltage 2 (no attenuation) OutputsOUT BP: Bandpass Filter Output OUT LP: Lowpass Filter Output This VCF is based on the ARP 4023 VCF; it is one of the two most common VCF designs around (the other being the ladder filter). It has a great sound, very wide ranging and is happy to self-oscillate when the Q pot is cranked.

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