electro-music.com :: View topic - Just another Transistor Ladder Filter
9V powered Korg MS-20 filter | DIY Music & ...
Further With Filters
Analog Synthesizer Filter using one opamp | Elektor Magazine
Synth DIY: a White Noise generator (part 2 of 2) | synthnerd
STEINER VCF
Simple Variable High Pass Filter – Improvements : r/synthdiy
Moog-type High-pass Ladder VCF | Electronic things… and stuff
A Guide to Synth Filter Types: Ladders, Steiner-Parkers, | Reverb News
Synth schematics--::-- Filter
index-filtpvoks
Modular synthesis intro, part 8: State-variable filters - North Coast Synthesis Ltd.
DIY SYNTH VCF Part 1: Analog Filtering Basics - YouTube
Minimoog VCF clone
SSM2044 LP Filter designs – Electric Druid
A Guide to Synth Filter Types: Ladders, Steiner-Parkers, | Reverb News
Eddy Bergman.com: Synthesizer Build part-12: THE KORG MS20 FILTER.
Synth schematics--::-- Minimoog Filter
Synth schematics - WASP Filter
roland_filter_versions
Ken Stone's Modular Synthesizer
