Filter
Filters are another important part of a Eurorack system. Like its name suggests, a filter removes part of the signal, and lets the other part of the signal pass through. The type of filter determines what part of the signal gets filtered, and what passes through.
The most common types of filters are low pass, high pass and band pass. Low pass filters let low frequencies pass through and filter out high frequencies, which can give things a sort of underwater quality. These are sometimes referred to as high cut filters because they are cutting the high frequencies.
High pass filters do the opposite, allowing high frequencies to pass through while filtering out low frequencies. High pass filters are often used to create a rising sensation during the breakdown of a song to emphasize the bass drum once it kicks back in.
Band pass filters are a combination of high and low pass filters. They cut the signal above and below the cutoff frequency, letting only a narrow frequency band through. Notch filters, or Band reject filters, do the opposite and remove a band from the signal, which can create a swishy effect similar to a flanger.
The filter cutoff frequency is the point where the filtering begins to occur. By sweeping or modulating this cutoff frequency with various sources a huge range of timbres can be achieved.
The number of poles, or slope of a filter determines how gradually or abruptly the signal is filtered beyond the filter’s cutoff point.
A filter’s resonance, or Q refers to the amount of feedback applied at the filter’s cutoff point. This is sometimes referred to as emphasis because it emphasizes and exaggerates the filter’s cutoff point. Some filters have the ability to self resonate with high resonance or Q. This means that without an input signal connected, the filter is able to generate enough feedback at the cutoff frequency to generate a tone. This tone takes the form of a pure sine wave, which enables self resonating filters to also function as oscillators.
Grp Synthesizer - Fixed Filter BankGrp Synthesizer - Fixed Filter Bank
Twelve BP filters, one HP, one LP at spaced cutoff frequencies
Panel Width: 16 HP
+12V = 62mA
-12V = 60mA
+5V = 0mAManual€ 385,00
AJH Gemini 2412 Dual SVF blackAJH - Gemini 2412 Dual SVF black
This module comprises two fully featured, and beautiful sounding 12db multimode filters, based around the classic vintage SEM filters. Each individual filter has LP, BP and HP outputs, along with…€ 499,00 € 449,00
AJH Gemini 2412 Dual SVF silverAJH - Gemini 2412 Dual SVF silver
This module comprises two fully featured, and beautiful sounding 12db multimode filters, based around the classic vintage SEM filters. Each individual filter has LP, BP and HP outputs, along with…€ 499,00 € 449,00
IO Instruments - EUPORIE (VCF)IO Instruments - EUPORIE (VCF)
Four Pole LOWPASS VCF with Moog and Sallen&Key Resonance
Powerful Sound from sweet to overdriven with lot of character
Simultan 24dB, 12dB & 6 dB Filter Outs
12dB State Variable Highpass Input…€ 129,00 € 119,00
AJH Minimod Sonic XV blackAJH-Synth Minimod Sonic XV black
The Sonic XV Eurorack module is a four pole Diode Ladder Filter, featuring the circuitry and sound of the Musonics Sonic V synthesiser, which has a quite different character from transistor ladder…€ 379,00 € 359,00
Doepfer A-101-3 Modular Vactrol Phase FilterModule A-101-3 is a 12 stage phase shifter with vactrols as phase shifting elements. Vactrols are known for their smooth sound behaviour. For more general details about vactrols please look at the Vactrol Basics page.
In contrast…€ 359,00
Doepfer A-101-6 Six Stage Opto FET VCFDoepfer A-101-6 Six Stage Opto FET VCF
A-101-6 is a new filter module that uses so-called opto FETs to control the filter frequency. Opto FETs are very similar to Vactrols but use light depending field effect transistors (FETs)…€ 110,00
Doepfer A-102 Diode Low Pass (VCF9)(In Doepfer Bag, no box)
Module A-102 is a reproduction of the legendary low pass filter design that uses diodes in the filter stage as frequency controlling elements resulting in "strange" resonance behaviour and frequency…€ 100,00 € 88,00
Doepfer A-106-1 Xtreme Lowpass/Highpass Filter(In Doepfer Bag, no box)
Module A-106-1 has it's origin in our experiments to built a MS20 filter clone. The module is not exactly the same as the MS20 filter but similar. The famous original MS20 included two filters: a 12 dB…€ 135,00 € 119,00
Doepfer A-106-6 XP Filter(In Doepfer Bag, no box)
Module A-106-6 is a multimode filter that is based on the filter circuit of the Oberheim Xpander. The module features 15 different filter types (those filters of the A-107 that were available in the…€ 180,00 € 158,00
Doepfer A-108 6/12/24/48dB Low Pass FilterModule A-108 is a completely new voltage-controlled low pass pass filter based on the well-known transistor ladder (Moog ladder). The module has internally an 8 stage low pass filter with different slopes available: 6, 12, 18, 24,…
€ 180,00 € 165,00
Doepfer A-120v 24dB Low Pass Vintage Edition (black)(In Doepfer Bag, no box)
Doepfer A-120v 24dB Low Pass Vintage Edition (black)
Module A-120 is a voltage controlled low-pass filter, which filters out the higher parts of the sound spectrum, and lets lower frequencies pass…€ 140,00 € 119,00
Doepfer A-121-2 Multi mode filterDoepfer A-121-2 Multi mode filter
Module A-121 is a voltage-controlled multi-mode filter with a cut-off slope of -12 dB / octave. Four simultaneous outputs are available, each with different characteristics: low-pass, band-pass,…€ 135,00 € 125,00
Doepfer A-121-3 Micro VCFDOEPFER A-121-3 MICRO VCFModule A-121-3 is functionally nearly identical to module A-121-2. Only the distances between the controls and sockets are smaller and rubberized, small rotary knobs are used. Therefore the front panel…
€ 110,00 € 98,00
Doepfer A-123-2 6/12/18/24 dB HighpassDoepfer A-123-2 6/12/18/24 dB Highpass
A-123-2 is a voltage controlled highpass filter with four filter outputs (6, 12, 18 and 24dB slope). It also features voltage control of the resonance.
These controls and in/outputs are…€ 135,00 € 109,00
Doepfer A-125 Voltage Controlled Phase ShifterModule A-125 (VC Phaser) is a voltage controlled phase shifter.
Phase shifting can be controlled either manually or by voltage control.
Other parameters which can be controlled are resonance (governing the depth of the comb…€ 100,00
Doepfer A-128 Fixed Filter BankModule A-128 (Fixed Filter Bank) is a filter bank, made up of 15 parallel band pass filters, all with fixed middle frequencies and bandwidth (50 Hz / 75Hz / 110Hz / 150Hz / 220Hz / 350Hz / 500Hz / 750Hz / 1.1kHz / 1.6kHz / 2.2kHz…
€ 225,00 € 178,00
Doepfer A-196 Phase Locked Loop (PLL)Module A-196 contains a so-called phase locked loop (PLL). The basic PLL system is shown in the sketch at the bottom of this page. A PLL consists of three parts: voltage-controlled oscillator (VCO), phase comparator (PC), and…
€ 90,00
Grp Synthesizer - VCF 24dB Low PassGrp Synthesizer - VCF 24dB Low Pass
Transistor Ladder Filter w 1-4 poles LP and SELECT aux out
Two audio in (one adj) and two CV In (one adj)
Cutoff, Res, w Automatic Gain Change and ext CV in
Distortion, Amt Res CV In
Panel…€ 330,00
Intellijel Dr. Octature II (VCO/LFO)INTELLIJEL DR. OCTATURE II (VCO/LFO)4-POLE LOW PASS FILTER AND OCTATURE SINE WAVE VCO/LFOJust like the original Dr. Octature the basis of the module is a 4-pole lpf inspired by the classic “cascaded ota” design, but realized…
€ 299,00 € 239,00
Intellijel µVCFµVCFIntroducing the µVCF state variable filter.
This is another great David Dixon filter design that has been on the workbench for a while. It is a very clean and precise filter that also doubles as an excellent sine VCO.
It…€ 169,00 € 149,00
ReBach - CATCH VCF-AReBach - CATCH VCF-A
tasty filter with extreme resonance / self oscillation
∙ Eurorack Voltage Controlled 2 pole Lowpass Filter.
∙ High feedback / self oscillation level !
∙ 1 signal IN / 1 signal OUT / CV1 IN (adjustable)…€ 95,00 € 85,00
ReBach - GR21 VCFReBach - GR21 VCF Low Pass Filter
The GR21 is developed for bass applications also applicable for FX, with extremely rough sound and deep frequency range.
It has one line input, one fixed CV input, one variable CV input and one…€ 60,00 € 50,00
Tiptop Audio Z2040 4-Pole Prophet 5 VCFTiptop Audio Z2040 4-Pole Prophet 5 VCF
The Z2040 is a great sounding analog that gives a lush creamy character to any sound passing through its core. When paired with a snappy envelope like the z4000, the Z2040’s rubber-like…€ 199,00
TouellSkouarn Ar Merc’het Brao ModuleTouellSkouarn Ar Merc’het Brao Module
The Ar Merc’het Brao module is comprised of two filters and two overdrives.
As usual at Touellskouarn it has a Breton name: Ar Merc’het Brao means "The pretty girls".
It can be used…€ 349,00
WMD - Quad Anti Aliasing Filter (QAAF) BlackWMD Quad Anti Aliasing Filter (QAAF) Black
he WMD Quad Anti Aliasing Filter (QAAF) was conceptualized as the first expansion for the Phase Displacement Oscillator.
It is designed to eliminate aliasing and stair-step distortion…€ 239,00 € 199,00
Doepfer A-121s Stereo Multimode FilterDoepfer A-121s Stereo Multimode Filter
Module A-121s is a dual multimode filter which can be used for stereo applications as well as for parallel or serial organized dual mono filters. The core is a 12dB multimode filter…€ 285,00 € 249,00
Doepfer A-121sV Stereo Multimode Filter BlackDoepfer A-121sV Stereo Multimode Filter Black
Module A-121s is a dual multimode filter which can be used for stereo applications as well as for parallel or serial organized dual mono filters. The core is a 12dB multimode filter…€ 295,00 € 259,00
Frap Tools Fumana Dual 16 Bands Spectral Editor ModulFrap Tools Fumana Dual 16 Bands Spectral Editor Modul
The FUMANA is an all analog dual filter bank with various control to access dynamically these bands. Each filter bank is composed of an array of 16 independent 48dB/oct…€ 1.014,00 € 899,00
Doepfer A-105-2 24dB SSI Low Pass FilterDoepfer A-105-2 24dB SSI Low Pass Filter
Module A-105-2 is a voltage controlled low pass filter with 24dB/octave slope. It is the successor of the A-105 which had to be discontinued because the obsolete SSM2044 filter circuit.…€ 120,00
Doepfer A-105-2V 24dB SSI Low Pass FilterDoepfer A-105-2V 24dB SSI Low Pass Filter (black)
Module A-105-2 is a voltage controlled low pass filter with 24dB/octave slope. It is the successor of the A-105 which had to be discontinued because the obsolete SSM2044 filter…€ 135,00
