Old Part Day: Voltage Controlled Filters | Hackaday
DIRT Filter Schematic | Synthrotek
A Guide to Synth Filter Types: Ladders, Steiner-Parkers, | Reverb News
The Classic Sound of the Moog Ladder Filter | Universal Audio
Eddy Bergman.com: Synthesizer Build part-26: STEINER-PARKER VCF (Yusynth Design).
Synth DIY: a White Noise generator (part 2 of 2) | synthnerd
Eddy Bergman.com: Synthesizer Build part-7: THE MOOG LADDER FILTER.
DIY SYNTH VCF Part 2: Active Filters & Resonance - YouTube
Voltage Controlled State Variable Filter Schematic
Minimoog VCF clone
Kassutronics: KS-20 Filter
STEINER VCF
Synth schematics--::-- MS 20 Filter
Eddy Bergman.com: Synthesizer Build part-12: THE KORG MS20 FILTER.
Synth schematics - WASP Filter
Moog-type High-pass Ladder VCF | Electronic things… and stuff
DIY SYNTH VCF Part 1: Analog Filtering Basics - YouTube
Synth schematics--::-- SSM 2040 Filter
Synth schematics--::-- Minimoog Filter
Further With Filters
Synth-DIY Experimenter Board Voltage Controlled Filters
