VCF & EQ
available
This filter is based on the classic 2600 from the seventies and uses the LM3900 Norton opamp chip.It has an audio inputs, two CV ins and an audio out.You can control audio input level, CV levels, frequency cutoff and resonance.It has a beautiful sound and it can go from relatively clean to dirty and screamy depending on audio signal level and resonance.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
available
The VCF from the famous British pin matrix synth released in 1969.The VCZIII series VCF is a result of the collaboration of Feedback modules and CMS-LAB and is a modern re-creation of those temperamental, organic and beautiful sounding VCF from 1969 but with enhancements and adaptations to the Eurorack needs of 21st century.Features:• AS394 ultra well-matched monolithic NPN transistor pair• selected and matched BC550 and BC560 transistor pairs• WIMA capacitors• selected 2N3819 FET transistor• two mixed signal inputs• the CVs are 0-5Vpp, 10Vpp CVs can be attenuated with the CV1 pot and RESO CV potDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
Full featured, fully modular synthesiser for Eurorack with a pre-patched normalised signal path for quick setup.A combination of the XVCO TWO, Raging Bull 3.0 VCF/VCA, and System X Envelope, where each section can be used completely individually or as part of the larger whole.Onboard LFO for PWM and FM and Noise Source.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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Voltage controlled Filter Moog Taurus. Raging Bull is based on the legendary Moog Taurus Mk I VCF and VCA. It has a lovely, thick Moog-like quality, which is further enhanced by the drive you can get out of its VCA at higher settings.A big part of the sound of the Taurus was the way in which the VCF interfaced with the VCA, so on Raging Bull the VCA is always in the audio path. A toggle switch allows you to select ‘always open’ or CV control of the VCA from CV input 3.By sending an ADSR into CV3, the signal will go to the VCA CV input unattenuated and the VCF CV input via the attenuator 2. By sending a gate into CV3, and setting the attenuator to zero, the VCA can be gated while the gate has no affect on the VCF.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
Variable Roland style filter. Based on the Roland System 700 state variable filter module. Lowpass, bandpass and highpass outputs. A big part of the sound of the State 700 is the way in which resonance is reduced as the audio inputs are driven harder. It won’t self oscillate with a hot audio input, throttle back a little and you’ll get squelchy ear bleeding resonances!DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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Expandable 4 channel VCA based stereo mixer with tone shaping and FX bus. Strips is also expandable! You can add a second strips, connected to the first via a 16 pin to 16 pin cable. The cable powers the second Strips and gives you 8 channels to play with. The second Strips accesses the first Strips FX bus. When using in expanded configuration, the FX send/return and main outputs for the second Strips are not available.FX phase jumper – because not all FX that you might use in the FX loop are in phase with respect to their input/output. The phase jumper allows you to compensate for this and avoid weird phase cancellations.Features:• 4 x input channels, each featuring LEVEL, HIGH, LOW, FX send, PAN, MUTE and CV control of level.• FX send and stereo return + FX phase jumper• Left and Right Eurorack level inputs (2 x 3.5mm sockets)• Left and Right line level outputs (2 x 6.35mm sockets)• Scribble strips!DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
available
Whiteface is based on the legendary ARP4023 VCF module often found in the “whiteface” ARP Odyssey Mk1. I’ve engineered out the rare parts and the need for matched transistors for the CV input section by using a Roland-inspired circuit there instead, no change to the vibe though!The audio path remains pure ARP, with one exception – built as specified on the schematic, the resonance would clip in a way which is neither musical or desirable when set too high. I’ve come across a couple of other versions which have this ‘don’t turn it up past 8’ trait, but I went further and engineered that out – a single resistor value change. In Whiteface, the resonance is usable and musical over the entire range!DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
Roland System 100M based VCF for Eurorack. Way back in the mists of time, I acquired a Roland System 100m, my first modular system. I’d used Roland synths of that era before, and what always stood out was the clarity and precision of the filters, clean and squelchy with searing resonance. My 100m boasted 3 filters, and had these qualities in spades. When I started out into Eurorack, it was this sound that I craved, but there was nothing quite like it available in the format, so I made my own. Soon, folks started knocking, asking me to build a Roland style filter module for them too. So, System X Filter was born, adding a 12dB output in addition to the regular 24dB output. This module has adapted and changed over the time we have been producing it, now renamed XCF TWO to sit alongside our XVCO TWO. I like to feel that the current version is the best of the lot!DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
This is the DIY version of this unit.Solid Felt is a stereo multimode analog filter in desktop format.Its name comes from the etymology of the words “stereo” and “filter”.From subtle timbral variation to an all-encompassing sonic treatment, Solid Felt can be used in multiple ways to embellish or vandalize your sound bouquet:As two independent mono filtersto give a stereo treatment to a mono signalto filter a stereo signal at the same cutoff frequency on the L and R channelsAs a mono 24dB/oct filter (placing the two filters in series)To synthesize sounds, via external feedback patchingTo extrapolate a CV signal from your audio input and use it to control any of its parameter or external gearAs a stereo overdrive effectTo bring line level signals to Eurorack levelFeatures:• 2x Analog multimode analog filters• 2x 1/4″ jack high impedance inputs• 2x 1/4″ jack low impedance outputs• 8x 1/8″ jack eurorack compatible CV inputs• 8x 1/8″ jack eurorack compatible CV outputs• Input gain control to amplify incoming signals up to fuzzy territory• mode control to select between lowpass, bandpass and highpass filter response (CV controllable)• an envelope follower (normalled to input A) which is fed into a three stage clock divider• a voltage controlled LFO with waveform blend control and two outputs 180° out of phase• a voltage controlled LFO with rising and falling sawtooth outputsDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled unit. The kit includes all parts to build the unit. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
The Omen is a dual LPG with a bit more than you might be used to. Like you, I once was lost in the world of low pass gates, seeking something more, something bigger and somehow juicier. The inspiration came to me as I was reading a particularly heavy book on passive filters, and I realized it was possible to make far more interesting LPG designs than the standard we've become so accustomed to.In a convergence of old-school LPG design and more modern components, the Omen boasts two -6dB resonant filters, custom built vactrols, built in CV attenuation and no less than three cutoff modes per filter. Filter 1 is soft and light, imparting a gentle, naturally gated touch of filtering on your sound, while Filter 2 is darker and more resonant, and can turn downright growly and distorted when left wide open.Designed to give you as many creative options as possible, the Omen has the unique ability to function as either two discrete LPG, or as one 4-pole resonant LPG. When plugging a signal in to Input 1, and with no signal plugged into Input 2, the output will be present at both Output 1 and Output 2, with Output 2 producing the signal as it passes through both filters. Tweaking both filters independently will generate a wide array of soft and sometimes harsh tones, ranging from Buchla bongos to early synthesis brass and organ sounds. There is much to love here.CV is similarly handled, by plugging in only one CV source, it will act on both channels - this is useful for creating musically similar outputs as well as when using the dual filter operation. However, the dual filter mode greatly benefits from having two CV inputs: use an envelope in CV1 to act as a VCA, and an LFO in CV2 to create tremolo, for instance.Using custom designed, hand built vactrols, care has been taken to mitigate the less desirable aspects of passive LPGs - in most modules, the user can expect zero bleed through on the LPG channels, and signal attenuation is minimal even with the 4-pole filter settings engaged. Of course, many of the natural features of vactrols remain, such as subtle memory effect when engaging the vactrol for long periods.DIY enthusiast? Rejoice! The Omen is available as a fully loaded DIY kit - everything you need to build your very own Omen packed in one place, so you can easily build one in the comfort of your own home. It is not a difficult DIY project, an ambitious beginner or someone with experience from a few easy builds can tackle the Omen in an afternoon. The build is all through-hole aside from three SMD components, which are easily soldered by hand due to their large size.Finally, you receive maximum blinkenlights as LED's on the front panel simulate the action of the vactrols, so you'll always know what's going on under the hood. No collection of fancy LPG's is complete without the Omen - add some analog warmth to your signals, today.Features:• Functions both as two discrete LPGs or as one multi-pole filter LPG• A passive LPG without the characteristic signal bleed or input loss• You read that right: each LPG contains a resonant two-pole filter• Comprehensive build guide, complete with picturesDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
HEX row is an analogue dual resonant filter with versatile routing capabilities, sidechain/envelope follower and mischievous character, stemming from (mis)use of transistors as variable resistors in the signal route.There are two channels, each controlled by three potentiometers: GAIN (2), RES (3), FREQ (4) and sidechained by CENTER (5). Both channels have the same topology. Inputs •| and |• are fed into each channel’s gain stage and then passed to their filters. The input signal level can be adjusted by setting the GAIN which can either attenuate or amplify a signal x20. Note that the amplification affects the filter’s behaviour—high GAIN disrupts self-oscillation, conjuring PLL-esque harmonics and other sound design artefacts. FREQ and RES are used to manipulate individual filter’s cutoff frequency and resonance. Each channel has a side-mounted switch (6) for selecting low-pass or band-pass filtering. Touch the golden touch pads (1) to manually route the flow of audio and control voltages.SIDECHAIN – Left channel’s (•I, •O) post-gain signal is filtered and fed into an envelope follower. Envelopes polarity and amplitude are adjusted by using CENTER. The adjusted envelope is then mixed in the right(|•, O•) channel’s FREQ parameter. Left half of the CENTER causes the filter to “duck” and the right half produces a gating response. In the middle position, the sidechain effect is inactive.TOPOLOGIESFEEDBACK – Connect the •O and I• sockets with a jack cable and use O• as the main output. Leave •I unconnected as it’s normalised to O• by default.Alternatively, using stereo cables and a headphone splitter adapter enables the use of •O as output with dramatic stereo field dynamics.SERIAL – Connect the audio source to I• and use the •O as output.Input signals are processed through subsequent channels as •I is normalised to O•. This mode enables the so-called twin peak and auto-filtering.PARALLEL – Connect a stereo audio source into •I or two mono sources to •I and I•.Left and right signals are split into separate channels, processed and output as stereo signal via •O or as mono on both outputs.You will need a soldering iron, solder, pliers, tweezers and some patience. Before you begin the process, make sure you are working on a clean, well-lit surface. Be careful with the components, some of them are very small—take them out of the packaging one at a time, when needed. Most of the tiny SMD components are marked with numbers that match the numbers printed on the PCB. If you are new to soldering (SMD), we recommend watching some online tutorials beforehand. For the assembly video, visit our website. In any case, take it slow, go step by step and enjoy the process of building your HEX. It’s like a puzzle that you can use and play with afterwards. Oh, and if you have any questions, do not hesitate to contact us. Have fun!COMPONENTS1. 4,7uF capacitor / 5x2. 10uF capacitor / 2x3. Header pins / 1x4. 3.5mm jack / 4x5. Potentiometers + knobs / 7x6. Nuts + bolts / 5x7. PCB + wooden base / 1xDIY-Kit-Type:SMD-Kit-2. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. It includes SMD and through-hole parts! For build guide, more info, videos etc. please check the buttons below.
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Analog optocoupler filther.GOBLET is an analog filter and distortion unit with some added quirks and extra controls. Start with both faders - frequency and resonance - at maximum, turn the trimmers fully clockwise and set the feedback pot at 0. Now insert an input and take the output either from the lowpass out or the notch out. Start to turn the frequency trimmer until the resonance kicks in. Now adjust the resonance trimmer to your taste. The faders now have full range of responsiveness. Adjust the feedback and start the filthering. For extra distortion interact with the two touch plates and the central momentary button.Features:• Unique analog two pole circuit with custom optocouplers fed directly in the feedback path.• Two step controls and individual CV inputs on frequency and resonance for precise sound sculpting.• Dedicated potentiometer for the total amount of feedback.• A performance-oriented momentary switch for extra distortion.• Two expressive touch points to make your body interact with the circuit.• Rhythmically oriented accent CV input.• Two outputs - a smoother LP and an aggressive notch.• Works with audio and CV sources.• Single board design - extremely skiff friendly.• “Whatever” power connector a.k.a. don’t mind the polarity.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
A 4-pole multimode filter based on the SSI2140 integrated circuit. Essentially an updated version of the classic SSM2040, the new SSI2140 adds better temperature compensation and a VCA that helps eliminate low frequency damping at high resonance settings. Besides the obligatory 4-pole low pass, MACA adds both 2-pole low pass and 4-pole band pass outputs. There is also an input level control that allows you to easily overdrive the filter core.Features:• 4-pole LP, 2-pole LP, & 4-pole BP outputs• Input level control• 16hz-16khz range• "Q" CV input• Inverting attenuator on "FM" input• "V/oct" CV input• Sine wave oscillator at high "Q" settings• Reverse power polarity protectionDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
The FPF Fixed Passive Filter is a simple utility filter with fixed cutoff frequencies for Highpass, Lowpass and Bandpass. If you want to roll off the high frequencies or eliminate some rumble on synth sounds it does a pretty good job cleaning up signals. It is a simple passive RC filter combination and therefore causes a little loudness drop on your signal. This DIY kit is very beginner friendly.Passive module, no power required.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
The FPF Fixed Passive Filter is a simple utility filter with fixed cutoff frequencies for Highpass, Lowpass and Bandpass. If you want to roll off the high frequencies or eliminate some rumble on synth sounds it does a pretty good job cleaning up signals. It is a simple passive RC filter combination and therefore causes a little loudness drop on your signal. This DIY kit is very beginner friendly.Passive module, no power required.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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Farb Highpass is an analog transistor ladder highpass filter, and features a distinct circuit from the classic lowpass ladder. We tweaked the circuit and added CV-able resonance to the feedback path.We also added a Tilt EQ. It lets you either bring some of the warmth back in, or double down on the highpass and go all sizzly.We have always been fascinated with analogue effects circuits, and we love the way their quirks and nonlinearities inspire us to find new sounds.Farb Highpass features a distinct circuit from the classic lowpass ladder. We tweaked the circuit and added CV-able resonance to the feedback path. This module crosses the sonic richness of the classic East Coast highpass ladder filter with added fine control from its weighted input stage.It is part of our Farbfilter (colour filter) range of sound colouring modules, offering a wide sonic palette from lending glowing warmth to electric sizzle in 4 HP.Farb Highpass is designed to be an easy, beginner-friendly DIY build you can solder yourself.Features:• Classic analog circuit: Transistor Ladder Highpass Filter.• CV and Offset for Low Cut.• CV and Attenuation for Resonance.• Tilt EQ to add bass or sizzle.• Backlit panel offers instant visual feedback over CV.• Flip panel: with or without number.DIY-Kit-Type:Semi-DIY-Kit. Most of the components are completely ready, you only have to assemble panel, knobs and some screws/washers.
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Full DIY kit for a seven-band Eurorack Graphic EQ inspired by the classic Boss GE-7 pedalA compact and high quality seven band graphic equaliser for Eurorack. Inspired by the Boss GE-7 pedal, but with pristine low-noise circuitry and a much broader frequency range. Push the faders up and to the left to boost, down and to the right to cut. Works great in feedback loops or as a tone control for individual voices. The kit comes with silver alu panel.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
This full kit is great for learning SMD/Surface mount soldering. Build a super skiff friendly and great sounding EQ module. Music Thing have produced a new revision of this MTM board which includes a few through hole parts such as the electro caps to make this an easy way into surface mount soldering. It’s really not a hard kit if you’ve done a handful of through hole soldering projects previously. It includes a full and in-depth build doc for complete SMD beginners too. All parts are individually bagged and labelled and we’ve included extra parts for practice.Simple EQ – Learn SMD soldering by building two channels of the kind of tone controls you’d find on an old hifi. No voltage control, but just enough range to push sounds into distortion. Works well in a feedback loop.DIY-Kit-Type:SMD-Kit-2. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. It includes SMD and through-hole parts! For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
The Workshop System is a complete modular synthesizer and audio computer – small enough to fit in a book-sized case, but packed with sound-shaping tools and educational potential. Designed for musicians, makers and tinkerers, it’s a fully modular playground for learning, composing, experimenting, and hacking.The system includes 14 analog and digital modules, ranging from vintage-style oscillators and filters to a programmable digital Computer module with swappable program cards. It works standalone inside its custom case or can be mounted in a Eurorack system (42 HP).You can use the system for crafting pure tones, exploring feedback loops, integrating guitar pedals, or writing your own firmware – the Workshop System invites hands-on discovery and creative exploration.Features:• Complete modular synth in a compact, case-mounted 42HP format• Includes 14 modules: oscillators, filters, mixer, ring mod, stompbox loop, envelope generators, and more• Powerful Computer module with RP2040 brain and reprogrammable program cards• Runs on USB-C (Power Delivery!) power (15 V) or standard Eurorack barrel input (15-25 V DC)• Works with audio sources, guitar pedals, microphones, and external MIDI/CV gear• Designed for experimentation, hacking, education – and serious music making The kit does not include:• Eurorack patch cables – we figure that many users of modular synths already have patch cables lying around – but if you’re just starting out and would like a set of short patch cables then we have a cable set available HERE• A power cable – The Workshop System has two power options: The easiest way is via USB-C PD power, but you can also use a regular 15-25 V DC barrel connection like THIS. The system will happily run from battery powerbanks and laptop adaptors. We feel that there are already enough USB-C cables in the world.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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Elmyra 2 is a 4-voice digital/analog hybrid platform for microtonal sonic exploration, capable of creating anything from lush ambient soundscapes to gritty droning textures and shrieking noises, available as a 42 HP Eurorack module or semi-modular desktop synth. With 31 modulation targets, 4 polymetric sequencers, delay, additional per-voice effects, a choice of various filters, as well as onboard LFOs and utilities, it is essentially a purpose-built small modular system in itself. A set of preset cards (included) or electronic components like capacitors or diodes can be plugged into the front panel in order to change the sound character.Features:• 4 independent voices activated by touch or CV• wavetable-based complex oscillator engine, up to 12 oscillators in total, 1V/octave compatible• chromatic mode makes chords and harmonic sounds possible, microtonal scales supported• 41 patch points• 31 modulation targets• touchpads with analog envelopes that can be used as modulation sources• resonant filter switchable between:• boomy and aggressive multimode 2-pole state variable filter (low-pass, band-pass, high-pass)• creamy 4-pole low-pass ladder filter• delay with unhealthy amounts of feedback• lo-fi reverb• analog OUCH circuit: a unique combination of destructive distortion, waveshaping and filtering• sonic character can be customised by using special preset cards (set of 4 included) or components like diodes that can be plugged into the front panel• preset cards can be used with other Neutral Labs modules• external audio can be processed via audio input• 9 per-voice modulations and effects:• unison detune• dual sub-oscillators• saturation• bitmangler• sample rate reduction• noise• high-pass filter• low-pass filter• 2 LFOs: 1 sine, 1 complex morphable• 4 sequencers with arbitrary step length per voice (up to 128), allows polymetric structures• delay time and LFOs can be clock-synced or unsynced (tap tempo is also possible)• utilities• dual attenuator/buffered multiple/voltage generator• CV summing circuit• solid bamboo wood case• boutique synth handmade in GermanyDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.