VCF - Eurorack modules

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Transistor Ladder Filter

Kassutronics

"My version of the filter is not intended to be an exact replica of the Moog filter. While it uses the traditional transistor ladder core and exponential converter, I used an opamp instrumentation amplifier (inspired by Rick Jansen) as output stage replacing the original discrete outputs. I added a CV input with attenuverter and a Drive control, allowing to adjust the input saturation that is a significant part of the filters characteristic sound."

Documentation

Box of Angels

Djupviks Elektronik

Box of Angels is a three stages bandpass/bandpassgate with integrated noise source. It can be used as a bandpass filter in three stages, as a bandpass gate/crude VCA, as a separate dirty noise source. The noise source is normalled to the input giving you the opportunity to use it as a sound source on its own. There is also a dedicated noise output if you want to use the dirty noise with other modules in your rack.

Modular Addict

Dreadful VCF

Tom Evans

The Dual Dreadful VCF is a dual filter with cutoff, resonance, and CV input with attenuation per channel. The filters have a shared Spread control on an attenuverter that causes the cutoff frequencies to move in opposite directions. Spread can also be controlled by CV.

Build Guide
Pusherman

CubuSynth

The CubuSynth Dual CS-20 VCF is a versatile module that combines two 12db filter cores in a dual/stereo configuration. It is inspired by the iconic Korg MS-20 synthesizer, offering similar sound characteristics while the resonance can be pushed even further.

The module provides multiple filter modes, including low pass and high pass, which can be blended together to create a diverse range of filter responses.

CubuSynth - Dual CS-20 VCF (DIY)

Marsupial

SetonixSynth

The SetonixSynth Marsupial Dual Voltage-Controlled Filter is a new dual filter design based around the re-issued AS3350 filter IC, originally used in rare synths such as the Synton Syrinx, Crumar Spirit and Rhodes Chroma but never widely utilized. Normalization between the control inputs and a Series/Parallel switch makes it simple to dial in a huge variety of unique and musical filter sounds.

User Manual

Aperture

RYO Modular

Vactrol LPF / LPG / VCA inspired by the 292 Lowpass Gate of the 1970s Buchla 200 series modular system.

Manual

PAL VCF

Fonitronik

PAL = Phase shifter, All pass filter, or Low pass filter

A lowpass/allpass VCF based on the CEM3320 4-pole filter IC. The allpass mode makes this one rather unique.

honey

WGD Modular

"A nice simplifation of a famous filter fitted in only 4hp to fit very small racks."

Think wasp not bee

Twin Peaks Dual VCF

dlakwi Ensign Core

Bandpass filter based on Rob Hordijk's Twin Peak filter.

This rendition uses two Electrosmith 2144 LPF submodules according to Hordijk's flowchart.

YouTube Twin Peaks Filter sample #1

Tube VCF

La cigale ~ rvrv

ModWiggler 'Pcb / Panel available - 1J17B Tube VCF eurorack'

Inspiration

291 VCF

Stroh Modular (aka J3RK)

'291' BPF - Buchla, Verbos, J3RK

ModWiggler 'Pseudo .5 291 Bandpass Filter Board'

Modular Synthesis

VCF-1

Skull & Circuits

4 hp build of Skull & Circuit's Vactrol filter VCF-1

paper label panel design

Bi-N-tic VCF

CGS / Mordent Design

Comb filter

Electronotes article from EN92

Tindie PCB

paper label panel design

Motomouth

Limaflow @ Synthrotek

analogue 3-Band, Sedra + Espinoza Bandpass Filter (DABP) with resonant frequencies that are tuned to the same resonant frequencies found in the human mouth and nose cavities

SVF

Zlob Modular

4hp 2-pole 12dB State Variable Filter

Resonate

nonlinearcircuits

based on the core circuit of the Korg 3100 Resonator, Resonate has 4 VC bandpass stages and a feedback control

Boing!

SetonixSynth

Discrete LPG with ping

@ Modular Addict

Switched Resistor VCF

Barton Musical Circuits

all analog switched resistor filter

paper label panel design

diode ladder VCF

Barton Musical Circuits

4-pole diode-ladder low pass filter

paper label panel design

Lopass Gate

Thomas White / dla.kwi Ensign

a distant cousin PCB project that is a derivative version of the famous Buchla 292c Lopass Gate

SynthCube PCB

paper label panel design

I can't believe it's not a VCO

nonlinear circuits

"This module is based on ideas presented in Electronotes #132. It is a VCF with a 'filter exciter' section to allow a wide variety of acoustic, semi-acoustic and not-acoustic-at-all sounds."

Polivoks VCF

Erica Synths

v0? before DIY

Pusherman Productions

updated: 2024-10-24