VCF & EQ
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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• case made of plant-based bioplastic and native German oakwood• 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.
sold out at the moment
Scrat - user customizable Steiner-Parker filter. Scrat is an aggressive sounding multimode Steiner-Parker filter with a twist: You can change the resonance response by plugging in components like diodes, capacitors or resistors (even LEDs and/or light-dependent resistors) directly to the front panel. A set of preset cartridges is also available, which gives you instant access to a variety of filter sounds. You could even make your own. Or go all in and connect some jumper wires to a breadboard for pretty much endless possibilities.The 2-pole filter (12 dB/octave) supports both high-pass and low-pass mode. Even without external components or cartridges, the resonance behaviour can be changed in various ways via switches on the front panel. A set of 4 preset cards called Nuts (Acorn, Almond, Cashew and Pecan) is also available.Both resonance and cutoff can be fully CV controlled, and the cutoff CV sensitivity can be adjusted as well. The module contains an adjustable pre-filter drive circuit, which pairs very well with the Steiner-Parker design.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 Coiler Multi-mode Filter and Rectifier packs an entire nest of sound-shaping features into a single 8HP Eurorack module. It's a two-pole state-variable filter based on a unique integrator design which stores energy in both inductors and capacitors depending on the frequency range. The transition region between the two components, and the saturation characteristics of the traditional OTA-based amplifiers, offer warmth and ever-shifting timbres in the midrange, along with hissing highs and slithering lows. This is a somewhat unpredictable filter.With simultaneous low-pass, band-pass, and high-pass outputs, the Coiler works well in traditional subtractive patches. But its built-in full-wave rectifier is also great for adding harmonics and distortion in patches from the other coast. When combined with low-pass, the rectifier allows the Coiler to serve as a basic envelope follower, for compression and external-signal patches. It's a lot of bite for the buck, and for the rack space.The MSK 009 Coiler VCF is available as a pre-built 6HP Eurorack module or a DIY kit. Slide one into your rack today.Features:• High-quality potentiometers with bushings fastened to the panel for wobble-free operation; conductive plastic for smooth feel; rated for one million operations lifespan (compare to fifteen thousand or less for typical cheap pots)• All-new circuit, not a clone or imitation of anything else• Through-hole for easy hand construction and maintenance• No compromises on build quality: real aluminum panel, not PCB material, with colour printing; nickel and gold plating on the circuit board; close-tolerance metal film fixed resistors.• Fully open design - no lock-inDIY-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
There are hundreds of analog synthesizer VCFs, but only a few core designs. You've got your Moog transistor ladder and imitators that use diodes or other substitutes; you've got your two-pole state variable filter, maybe cascaded to get additional poles; and that's about it. Your grandmother was making electronic music with these designs in the 1960s, and not much has happened since. There are a few more options available in digital and semi-digital (such as switched-capacitor) architectures, but most analog designers have given up trying to create really new filters. Instead, they compete on how well they can imitate or clone specific "vintage" filters.The North Coast Synthesis MSK 007 Leapfrog is new and different, with a sound all its own. The fifth-order "leapfrog" core topology, with five integrators and multiple feedback loops, originates in scientific work more recent than the 1960s and as far as we know never before available in a modular synth VCF. The near-elliptic response curve has an extremely sharp cutoff, with ripple in the passband and nulls in the stopband at frequencies chosen to be musically relevant.Sweep the cutoff and hear each harmonic pop into existence and wobble around before the next one arrives. Choose a timbre, and the temperature compensated volt per octave tracking will keep it consistent across the frequency range. Change it up with exponential and linear frequency modulation. There's even a built-in VCA, because you can never have too many VCAs.Features:• High-quality potentiometers with bushings fastened to the panel for wobble-free operation; conductive plastic for smooth feel; rated for one million operations lifespan (compare to fifteen thousand or less for typical cheap pots)• All-new design, not a clone or imitation of anything else• Ultra-sharp five-pole near-elliptic low-pass response, 61dB/octave at the least steep part of the main cutoff slope, with peaks and nulls at musically relevant frequencies• Built-in VCA switchable to feedback or output modes from the front panel - no jumpers• Temperature compensated V/octave tracking• Through-hole for easy hand construction and maintenance• Connectors between boards, and panel controls mounted on a board - no flying wires• No compromises on build quality: real aluminum panel, not PCB material, with colour printing; panel screwed solidly to both the PCBs and the pots and jacks, for maximum ruggedness; nickel and gold plating on the circuit boards; polystyrene integrator capacitors; close-tolerance metal film fixed resistors; multiturn trimmers.• Fully open design - no lock-inDIY-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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Etna is an advanced triple control analog multimode morphing filter, meticulously designed for precise and dynamic sound shaping. It allows for rapid or smooth transitions between diverse filter settings, known as snapshots.Each snapshot comprehensively defines all of the filter’s parameters, which can be adjusted either swiftly or gradually. These transitions are controlled through an applied voltage or clock and triggers, with the flexibility to use up to eight distinct stages for creating complex filtering effects in a variety of audio applications.In addition to its morphing capabilities, Etna incorporates analog controls that enable real-time, expressive modifications to the parameters of each saved snapshot. This enhancement not only enriches the morphing process but also provides a tactile, live experience that adds significant depth and nuance to the audio output, making it a powerful tool for both studio and live performance settings.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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Moon Phase is a stereo 12dB/octave state variable multimode filter with powerful imaging technique to enhance and alter stereo field. The resonance behaves differently when stereo imager is open beyond any other filter when you play with the stereo imager control. With 8 different combinations and span to separate both filters, you increase the possibilities to treat your sounds and open them in the stereo field. Applying audio rate cv to the stereo imager or span control input and sweeping the cutoff control will create a unique character to the filter. The resonant peaks can be shifted around the stereo field, every cv input can be modulated up to audio rate frequencies creating a wide palette of sonic combinations. Check out the video about the module.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
The Witch is a compact and versatile polyphonic synthesizer. The Witch can be used Standalone, with a MIDI Controller, Analog Sequencer, or MIDI Polyphonic Expression / MPE Controller. It's USB powered or with 9V DC.It comes with four different synth engines:• SubTract Virtual Analogue synthesizer with 48dB resonant filter• VoSim Voice Simulator formant synthesizer• WaveBank Morphing wavetable synthesizer• QuadSampler Sampler with peak filterEach synthesizer engine is provided in two variants:• Expression Mode Continuous pitch control and MPE support• Performance Mode Discrete pitch control, standalone chords and classic MIDI supportOther features include two assignable tap tempo LFOs with continuously variable shapes and a powerful effects section.As well as eight factory patches, the Witch is fully compatible with the OWL Library of more than 300 patches. What’s more, users can create their own patches using any of the supported DSP languages: Pure data, Max gen~, SOUL, Faust, Maximilian and C++.The Witch has its own Synth Editor web application: witch.rebeltech.orgDIY-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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Four multi model filters with stereo capability, combined with a six-stage four-channel modulation sequencer. Finally a filter bank that unifies the control of multiple parameters, enabling a spaghetti-free approach to formant animation fun.NIGHT RIDER cleverly turns the dials to where you want them, when you want, via it's unique modulation sequencer.PLEASE NOTE THE KIT IS ONLY SUITABLE FOR EXPERIENCED BUILDERS.Create dreamy swooshing 70’s phaser filter sweepsPhenomenal for phoneme vocal formant rasps and wheezesPlucking great for strumming Karplus Strong twangs, and pinging filter pings !Or, turn your silk into shredded cabbage, with the built in bad-ass clipping-saturatorWARNING! To build the kit you MUST have the following:• Two mini clamps• Clean high quality 2/3mm tip solder iron [ chisel type recommended ]• Mini Phillips screwdriver for M3 & M2 pan head screwsThe PCB is double sided, and any mistakes soldering some parts might be very difficult to fix laterThis is a complete kit for Eurorack, Including all parts:1xPCB (All SMD parts come already pre-soldered), a high quality screenprinted 2mm aluminium panel, encoders, knobs, switches, LED displays PCB, jack sockets, and all sundry components. Includes USB data cable for firmware install, sexy black Eurorack power cable, RYK stereo splitter cable.Features:Four filter blocks, with multiple models , including:• 6db BPF [ pingable ]• 12db BPF [ pingable ]• 12db variable width BPF• Comb Filter for Karplus Strom [ pluckable & flanger vibes ]• All Pass filter [ crazy Phaser vibes ]• Dual Input and Stereo output, with Pan control for each filter in the stereo field. Input can be Mono [ CH1 - 1,2,3,4 ] or Dual [ CH1-1,2 CH2 - 3,4 ]• Modulation Sequencer capable of being clocked, scanned, and interpolated• CV inputs for sequencer Interpolated scanning, 1V/Oct frequency offset, Slew amount, Resonance amount, Clock or MIDI clock input for sequence animation, MIDI CC• Memory slots for storing and retrieving Filter and animation setups, and retrieving preset formant, and chord based Filter setupsDIY-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
The SetonixSynth Marsupial 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.Features:• Two low-pass/band-pass filters with selectable Series/Parallel modes• Attenuverting CV inputs for each filter stage• Controls for Global Cutoff, Resonance, and offset of second filter• Self-resonating behavior with accurate 1V/Oct trackingDIY-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
* * * Dual Dagger is gonna be discontinued when sold out! Last ones available. * * *The Dual Dagger is a double-sided weapon, carefully sharpened to chop stereo signals. The module gives independent control over low-pass and high-pass cutoff frequencies, and an assignable resonance is shared on one control.The Link function turns the dual filter into a band-pass filter, with control over frequency, bandwidth and band edges resonance! The module is carefully calibrated to share the exact same parameters on both audio channels and thanks to the pan function, it is easy to break up the cutoff frequencies of each side up, which leads to a whole new territory of stereo treatments!Features:• Dual 24dB/octave (low pass and high pass) stereo filter• Individual control on the low pass and high pass frequencies• Shared and assignable control upon resonance• Link function turning the module into a 48dB/octave bandpass filter• CV input over low pass frequency, hi pass frequency and resonance• CV input for “panning” control of the low pass and the hi pass• Heavily calibrated module for identical left and right channels behaviourDIY-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.
available
Meet Dirty Dan, the eurorack rebel who doesn't play by the rules of clean and tidy. Dan's all about embracing the mess, dishing out gritty goodness, and making those pristine waveforms second-guess their existence. If your sound needs a touch of snotty charm, Dan's your man. Just remember, he's not just dirty – he's delightfully disruptive!Features• Vactrol-Based Analog Filter• Three Channels• Separate Distortion Stage• High Pass and Low Pass• Cutoff controls High Pass and Low Pass• Two Clipping Modes• Feedback Control• Skiff Friendly• Wrong Polarity ProtectionDIY-Kit-Type:Panel/PCB Kit. This is a do-it-yourself panel/PCB kit, no parts are supplied, you will need to source them yourself.
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Rocinante's Gate is not a classical low-pass gate (LPG) using vactrols, but goes way beyond that providing an adjustable envelope to control the "gate" through an analog filter. Sending a gate or trigger signal into the GATE INPUT will create these envelope shaped sounds you know from other LPGs.Features:• Low-Pass-Gate based on an Analog Filter• Internal Envelope Generator• Adjustable Rise, Decay, Length, Fall Stages• Internal LFO• Gate Level CV• Loop Mode• Re-Trigger Mode• Use the Envelope and LFO with External Modules• Skiff Friendly• Wrong Polarity ProtectionDIY-Kit-Type:Panel/PCB Kit. This is a do-it-yourself panel/PCB kit, no parts are supplied, you will need to source them yourself.
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Actually, it's a ST Modular's Franz'd Ripples, if you will. Like Franz, Werner is a filter with an internal mixer and LFO. Not as buttery as Franz, but still one of the best filters around.Features:• Analog Filter• 3 Filter Outputs: Low Pass 2-Pole, Low-Pass 4-Pole, Band Pass 2-Pole• VCA for Low-Pass 4-Pole• Internal LFO with three Waveforms: Triangle, Inverted Triangle & Square• LFO Reset, LED indicating LFO rate, LFO normalized to Filter Circuit• Apply three LFO waveforms at the same time• Attenuator for each LFO Wave or external CV• 3-Channel MOOG CP3 transistor based Mixer• Volume control for each Mixer Channel• Wrong Polarity ProtectionDIY-Kit-Type:Panel/PCB Kit. This is a do-it-yourself panel/PCB kit, no parts are supplied, you will need to source them yourself.
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Introducing Simple Designer: the ultimate rapid prototyping instrument for the synth community. Boasting 80 slots for potentiometers, switches, and jacks, plus the capability to incorporate faders and LEDs, it invites endless creativity. Whether you're building from the ground up or iterating on existing designs, Simple Designer, powered by the versatile Daisy Seed microcontroller, is your canvas for creating a full-blown synthesizer. Tailored for designers, makers, and musicians at any skill level, Simple Designer transforms your visionary concepts into tangible, sonic reality with unprecedented ease. Start crafting your masterpiece with Simple Designer today—where your synth dreams become reality.Features:• Programmable. All Simple kits come with the Daisy Seed microcontroller and access to our introduction to synth programming video course.• Open source instrument on Github.• Each kit comes with a video course teaching sound fundamentals: https://learn.synthux.academy/• Powerful music instrument for live performances.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.
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Unleash your creativity with Simple Fix, the rapid prototyping tool designed for synth designers, makers, and musicians. Powered by Daisy Seed microcontroller, Teensy, or Arduino Nano, it's your quick-start solution to bring ideas to life. Effortlessly add knobs, switches, and jacks, and dive into the limitless world of sound and functionality. Whether you're a pro or a passionate hobbyist, Simple Fix accelerates your design process, transforming inspiration into reality faster than ever. Start your journey towards groundbreaking designs today and unlock your creative potential with Simple Fix—where your next masterpiece begins.Features:• Programmable. All Simple kits come with the Daisy Seed microcontroller and access to our introduction to synth programming video course.• Open source instrument on Github.• Each kit comes with a video course teaching sound fundamentals: https://learn.synthux.academy/• Fits in your pocket.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.
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Discover Simple Touch, the go-to rapid prototyping instrument for synth enthusiasts, from designers to musicians. Featuring 12 touch pads, 6 potentiometers, two faders, and stereo input/output, all powered by the dynamic Daisy Seed microcontroller. Simple Touch is engineered to bring your sonic visions to life with precision and ease. Dive into a world where your fingertips command the future of sound, blending intuition with innovation. Ideal for both seasoned creators and passionate hobbyists, Simple Touch is your shortcut to prototype, experiment, and elevate your designs. Embrace the power of touch with Simple Touch, and transform your creative impulses into extraordinary musical inventions today.Features:• Programmable. All Simple kits come with the Daisy Seed microcontroller and access to our introduction to synth programming video course.• Open source instrument on Github.• Each kit comes with a video course teaching sound fundamentals: https://learn.synthux.academy/• Powerful music instrument for live performances.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.
available
The MS-22 is a dual voltage controlled filter, inspired by the classic Korg MS-20 filter, with an innovative modulation matrix and one of the highest function-to-hp ratios in the land of Eurorack. This module was inspired by many pleasant chats with tech journalist Steve O’Hear. Head over here for a full product description and demos.The MS-22 contains two dedicated filter circuits, one low-pass and the other a high-pass. These are configured in series, the low-pass going into the high-pass. This configuration allows for a unique duophonic fighting resonance behaviour (see this demo video). The cutoff frequencies of both filters can be CV’ed. Compared to most bread-and-butter MS-20 clones, the MS-22 is twice the amount of filter condensed down into half the package (4HP).Features:• Dual VCF inspired by the Korg MS-20 OTA filter• Low-pass into high-pass configuration• Innovative modulation matrix allows CV control over all parameters• Cut-off frequencies can be linked, resulting in a band pass filter with controllable bandwidth• Bipolar monitoring LEDs for the LP, HP, resonance and gain CV signals• One of the best functionality-to-size ratios in Eurorack with a width of 4 HP and a depth of 45 mmDIY-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
The 3394 Voice is a compact and flexible analog synth voice that packs a full signal chain into one module.VCO, VCF, VCA, envelopes, and noise. Based on the classic 3394 chip, it delivers rich analog tone with selectable square, saw, and triangle waveforms, routed through a juicy 24dB low-pass filter capable of self-resonance and pitch tracking. Two built-in envelopes shape both filter and amplitude, with switchable AD/AR modes for dynamic control. When unpatched, it acts as a constant VCO output, and the mix trimmer allows tonal variation by blending in a square sub, noise, or external signal. Ideal for melodic lines or snappy percussive sounds like kicks, snares, and zaps, the 3394 Voice is both a complete voice and a set of standalone building blocks for your Eurorack system.Features:• VCO with Triangle/Square/Saw waves• Lowpass resonant 24db filter• Square sub oscillator• Analog noise source• Built in VCA and 2 envelopes• Can also be used as separate Filter/VCO/VCA/Noise sourceDIY-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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Ar Merc’het Brao combines a pair of resonant −12 dB filters with two overdrive stages in a compact module; its Breton name translates as "The pretty girls." Configurable for stereo or dual-mono operation and crafted with guitarists in mind, each filter features a switchable mode (Low-Pass or High-Pass) and dedicated CV inputs for voltage control of the cutoff. Global cutoff and resonance controls shape both channels together while the overdrives add harmonic grit and saturation, yielding a versatile tone-shaping device that sits comfortably between modular synthesis and guitar-style processing.Features:• 2 X Resonant 12 dB slope Filter (High Pass/Low Pass)• 2 X Classic Overdrives• Filter Cutoff CV inputs• Global controls for Cutoff and Resonance• Stereo and double mono use• Modular and Guitar friendlyDIY-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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Distresañ is a musical Baxandall shelving EQ engineered for smooth, natural tonal shaping. Its bass and treble shelving controls let you gently boost or cut low and high bands, while a fixed mid control at 1 kHz lets you add or remove body without resorting to narrow, surgical boosts.Designed for broad tonal balance rather than corrective notching, Distresañ imparts hi-fi–style clarity and warmth with minimal artifacts, making it ideal for shaping sounds in mixing, mastering, and live reinforcement where a transparent, musical response is required.Features:• Baxandall shelving topology for smooth, musical bass and treble shaping.• Fixed 1 kHz mid control for adding or removing presence and body.• Designed for tonal balance and overall sound sculpting, not narrow corrective EQ.• Hi-fi–style response: natural-sounding adjustments with minimal artifacts or distortion.• Suitable for mixing, mastering, live sound, and general tone shaping.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.