ANALOG SYNTH RUSSIAN VCF FILTER

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"THESE ARE THE FEATURES AND HOW TO USE THEM:

-CV INPUT JACK: THIS INPUT STARTS AT ZERO AND GOES POSITIVE. THE CV KNOB THEN DETERMINES HOW MUCH MODULATION IS TO BE APPLIED

-FM INPUT JACK: THIS INPUT IS BI-POLAR AND SIMILAR TO THE CV INPUT. THE FM KNOB THEN SWEEPS FROM NEGATIVE TO POSTIVE. THE MIDDLE POSITION IS ZERO.

-(2) AUDIO INPUTS: THESE CAN BE LINE LEVEL, MODULAR VCO’S, ETC. THERE ARE (2) GAINS IF THE SIGNAL IS TO WEAK. WHEN OVERDRIVEN WITH A HEALTHY SIGNAL IT WILL SOFT CLIP AND SOUND TUBE-LIKE.

-THE LOWPASS AND BANDPASS JACKS ARE THE FILTER OUTPUTS. NORMALLY YOU CONNECT THIS TO A VCA NEXT. YOU CAN USE THE ONBOARD VCA. IT REQUIRES YOU TO MANUALLY MAKE THE PATCH.

-THE VCA KNOB IS TO ADJUST THE GATE MARK WHEN TOGGLING BETWEEN LOG AND LIN SETTINGS. THE LOG/LIN SWITCH IS FOR THE VCA. TO ADJUST THE GATE MARK TURN THE VCA KNOB UNTIL YOU HERE NO MORE SOUND COMING FROM THE VCA OUTPUT JACK. IT IS NOW READY TO BE CONTROLLED VIA THE VCA CV INPUTS. YOU CAN CONTROLL IT WITH AN ADSR/AR ENVELOPE GENERATOR OR LFO TRADITIONALLY. BUT YOU ARE FREE TO USE ALL KINDS OF SIGNALS TO CONTROL IT.

HOW THE SWITCHES FOR THE FILTER CORE WORK:

-THE TWO “REZ HACK” SWITCHES EITHER LOWER OR HIGHER THE REZ NOTCH. SO ONE WILL MAKE IT LESS HARSH AND SOFTEN THE REZ SOUND. THE OTHER SWITCH WILL MAKE IT HARSHER AND YOU WILL HERE THE DIFFERENCE. WHEN BOTH ARE ACTIVATED IT DOES NOT FULLY CANCEL OUT BUT PUTS THE NOTCH IN AN INTERESTING STATE. THE CUTOFF KNOB WILL ACT “BLOTTED” WHEN THE CUTOFF IS IN LOWER FREQUENCIES WHEN BOTH SWITCHES ARE ACTIVATED.

-THE BURBLE SWITCH: THIS WILL GIVE THE VCF A BLEED THROUGH STATE. IT WILL LET SOME OF THE HIGH FREQUENCIES THROUGH BUT WILL ALSO EFFECT THE REZ. WHEN ACTIVATE THE CUTOFF RANGE WILL ACT LIKE AN LFO. THIS IS THE SWITCH THAT MAKE THE STRANGEST BEHAVIOR."