Envelope & Modulation
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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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Meet the Swiss Army Knife's ambitious cousin - the multitasking marvel that sits in front of your Eurorack, ready to unravel musical puzzles, slice through soundscapes, and twea-zor its way into your sonic heart.Features:• Multiple• LFO• Attenuator• Fader• Swap• USB-PowerDIY-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.
sold out at the moment
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.
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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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The Automator is a hands-on, 2-channel tempo-synced CV and gate recorder for Eurorack, built around a large, expressive slider and intuitive controls. It captures your movements in real time, turning gestures into looping modulation patterns with precise timing. Requiring an external clock (4ppqn), Automator continuously records while idle and begins playback the moment you hit record, looping up to 4 bars. You can change loop length and tempo post-recording, and each channel—selectable via a button—is color-coded (red for channel 1, green for channel 2). CV is recorded via the slider, while gates are captured using a dedicated button, with high resolution and flexible timing. Whether you're drawing dynamic modulations or tight rhythmic triggers, Automator gives you a powerful and performative way to animate your patches.Features:• Dual-channel CV and Gate recorder with tempo sync• Dedicated Gate button for rhythmic trigger input• Supports loop lengths from ¼ bar to 4 bars• Channel selection button with color indication (Red = Ch1, Green = Ch2)• Real-time recording resolution (CV every 2ms, gates down to 50ms)• High gate density (up to 125 triggers per bar)• Recordings timestamped for accurate playback timing• Decoupled gate and CV recording for flexible pattern creation• Clock input (4 ppqn) with tempo scaling from 30 BPM upwards• Playback length can be changed after recording without losing dataDIY-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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The transistorkreis random is a quad true random voltage generator for modulation and for digital noise. There are two inputs to trigger new random voltages and each of the four outputs can be switched to• uniform or normal random distribution,• unipolar or bipolar voltage range,• an amplitude of 5 Vpp or 10 Vpp.Assembling the 3U DIY kit is straightforward since all SMD components are already soldered. Nevertheless, basic knowledge of soldering and electronics is mandatory. The generic design of the transistorkreis random supports any modular format and its firmware is open source. Respectively, you can customize it to suit your requirements. Including screws and washers for your module carrier and a Eurorack power cable with the Eurorack version, which is skiff-friendly.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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The transistorkreis random is a quad true random voltage generator for modulation and for digital noise. There are two inputs to trigger new random voltages and each of the four outputs can be switched to• uniform or normal random distribution,• unipolar or bipolar voltage range,• an amplitude of 5 Vpp or 10 Vpp.The generic design of the transistorkreis random supports any modular format and its firmware is open source. Respectively, you can customize it to suit your requirements. Including screws and washers for your module carrier and a Eurorack power cable with the Eurorack version, which is skiff-friendly.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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Hexa Core Slope GeneratorThe world of Envelope generators is a vast field where cultivating a new specie is a challenge that gets harder every day.We have lots of flavors to choose from: from classical ADSR to Serge-based Slope generators, through the newest digitally controlled multi-stage modules.The concept behind Fuji is not to create a new flavor, but to offer a big amount of the most primary envelope circuit along with some design decisions to make it a useful, immediate, and always musical tool.The slope of the envelopes is tuned with logarithmic Attack and exponential Decay. This configuration has been used for years as it follows the non-linearity of human hearing, keeping the dynamics changes always pleasant and natural to our ears.The range of both the Attack and Decay stages is symmetric, getting a minimum and maximum rise/fall time of either 1.5ms to 1.5s. This range has been also tuned to be musical and precise in most applications.Gate input chaining adds tons of flexibility to the patch. Groups of synced envelopes can be easily made with a few cables.Features:• Six channels• Fully analog AD envelope generators• Selectable Hold and LFO mode per channel• Daisy-chained Gate inputs• Envelope Level: 8V• Gate Input Threshold: 1.5VDIY-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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Halo is a compact quad LFO for Eurorack systems, designed to deliver a wide range of modulation sources in just 10HP. With four analog CV-controlled LFO channels and up to 16 simultaneous outputs, it provides everything from classic cyclic movement to complex logic-based modulation.Each channel offers manual and CV control over frequency, with selectable range settings covering slow cycles of more than two minutes up to audio-rate modulation at 80Hz. Triangle and square outputs are available per channel, giving you immediate access to classic LFO shapes for modulation, rhythm, movement and animation.The dedicated Logic section expands Halo far beyond a standard quad LFO. Each channel pair is processed through analog boolean circuits, generating AND, OR and XOR outputs, plus a mixed signal. This adds eight extra modulation outputs and creates evolving, interrelated patterns from simple source waves.Features:• Four analog CV-controlled LFO channels.• Manual and CV-controlled frequency per channel.• Triangle and square outputs for each LFO.• Selectable frequency range from over 2 minutes to 80Hz.• Dedicated Logic section with AND, OR, XOR and MIX outputs.• Eight additional logic-based modulation outputs.• Up to 16 simultaneous modulation signals in 10HP.• Compact Vostok layout with immediate hands-on control.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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2VL1 is a 12HP Eurorack module that offers 2 independent, syncable VCOs and 1 free-running LFO in one compact package. This module uses no rare parts and is an easy to medium DIY build with through hole soldering. This DIY module consists of an assembly of 3 PCBs and robust black anodized 2mm thick front panel with crisp laser engraved graphics.Knob colors might differ from pictures.Kits packed according to Revision 07Features• One VCO with Saw/Pulse/Triangle waves, another with Saw/Pulse• One free-running LFO with square and triangle 20s (50mHz)-30Hz• VCO B syncable to VCO A or external signal• High thermal stability• Extremely good tracking (<4 cents over 7+ octaves typical)• Robust old-school design with all through hole components, large copper traces, and easily obtainable replacement parts.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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Chaotic voltage generator in 3HP. It is a unique module because it has never existed as an electronic music instrument until now. The module is based on a circuit from a paper called “A simple chaotic circuit with a light-emitting diode” written by Volos, Wang, Jafari, and Kapitaniak.Diode Chaos produces 3 phases of interrelated morphing voltages including a chaotic trigger out. The range is 20-30 seconds a cycle up to audio rate, although only the X out and TRIG out go up to audio rate. The frequency is controlled by the RATE knob. Each output exhibits different behavior at different rate settings. X,Y, and Z outs like to stay in the 4vpp range although at different RATE settings the outs can reach 10vpp. The TRIG out chaotically releases 0-10v triggers although sometimes it will spit out smaller voltage peaks.LED soldermask windows provide constant display of positive and negative voltage crossings. Differences between chaos and random (some quoted and summarized material from Ian Fritz’s site) chaos is “highly irregular, but still contained within a finite region (the “strange attractor”)”. Chaos occurs in 3 dimensions chaos needs a non-linear element (with Diode Chaos the nonlinear element is a red LED, and the chaos is directly visible and useable at the TRIG out).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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Analog random voltage and noise generator in 3HP. It features sample/track and hold normalled to white noise with a toggle switch for selecting sample(switch right position) or track(switch left position) and hold function. There is also a PCB trimmer(at the top of the motherboard) to adjust the spread(gain) of random voltages out from “scalar” (low gain, counter clock wise) to large interval jumping(high gain, clock wise). All analog white, pink, and brown(red) noise 10vpp~(dependent on lower PCB trim). Smooth(infra red) random cv out at 10vpp with 2 range settings from wiggly with (more events, switch in left position) to almost random rise and fall envelope behavior (less events, switch in right position). White noise pcb trimmer sets the amplitude of the noise which in turn influences the rate of the infra out. LED solder mask windows indicate positive(red) and negative(blue) voltage crossings.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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This is the panel PCB version of this kit.Analog random voltage and noise generator in 3HP. It features sample/track and hold normalled to white noise with a toggle switch for selecting sample (switch right position) or track (switch left position) and hold function. There is also a PCB trimmer(at the top of the motherboard) to adjust the spread(gain) of random voltages out from “scalar” (low gain, counter clock wise) to large interval jumping (high gain, clock wise). All analog white, pink, and brown (red) noise 10vpp~ (dependent on lower PCB trim). Smooth (infra red) random cv out at 10vpp with 2 range settings from wiggly with (more events, switch in left position) to almost random rise and fall envelope behavior (less events, switch in right position). White noise pcb trimmer sets the amplitude of the noise which in turn influences the rate of the infra out. LED solder mask windows indicate positive(red) and negative(blue) voltage crossings.DIY-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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Analog random voltage and noise generator that expands upon the features of the Entropy Euroack Module in 3HPThe Entropy+Expander packs together some of the most random voltage options in 6hp. It provides a controllable “Glide”(slew) out for the S/T\H, a comparator with a controllable rate(“Thrsh”) of random gates(“Rand Gate”) out with an input to compare other waveforms(Comp In, inserting a cable into here breaks the white noise normalization), and high pass filtered white noise resulting in approximate “Blue noise”(+3db/octave) and “Violet noise”(+6db/octave) outs.The unique part of the circuit is a voltage controlled A/B switch thats normalled to the “Rand Gate” out that’s switching between the S/T\H out(left Blue led window)and Infra out(right Red led window), the Glide control also effects the S/T\H coming out of the switch so you can get really random results from the “Entropy Out.” Inserting a cable into “Switch CV In” breaks the random gate normalization and lets you toggle between A/B(left S/T\H out and right Infra out, indicated by the led windows) with your own gate or trigger.There is a jumper on the pcb to select if you want glide on the s/t\h at, Entropy out, or un-slewed operation. There is also a trimmer for setting the amplitude of the incoming signal at “Comp In” which sets the frequency range of random gates. This may have to be adjusted depending on your Entropy version.The random gate range can also be set up more as a noise oscillator by turning the pcb trim(clockwise) up or it can be set so random gates are extremely slow(trim counter clockwise) with minutes between random gates.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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This is the panel PCB version of this kit.Analog random voltage and noise generator that expands upon the features of the Entropy Euroack Module in 3 HP.The Entropy+Expander packs together some of the most random voltage options in 6 HP. It provides a controllable “Glide” (slew) out for the S/T\H, a comparator with a controllable rate (“Thrsh”) of random gates (“Rand Gate”) out with an input to compare other waveforms (Comp In, inserting a cable into here breaks the white noise normalization), and high pass filtered white noise resulting in approximate “Blue noise” (+3db/octave) and “Violet noise” (+6db/octave) outs.The unique part of the circuit is a voltage controlled A/B switch thats normalled to the “Rand Gate” out that’s switching between the S/T\H out (left Blue led window) and Infra out (right Red led window), the Glide control also effects the S/T\H coming out of the switch so you can get really random results from the “Entropy Out.” Inserting a cable into “Switch CV In” breaks the random gate normalization and lets you toggle between A/B (left S/T\H out and right Infra out, indicated by the led windows) with your own gate or trigger.There is a jumper on the pcb to select if you want glide on the S/T\H at, Entropy out, or un-slewed operation. There is also a trimmer for setting the amplitude of the incoming signal at “Comp In” which sets the frequency range of random gates. This may have to be adjusted depending on your Entropy version. The random gate range can also be set up more as a noise oscillator by turning the pcb trim (clockwise) up or it can be set so random gates are extremely slow (trim counter clockwise) with minutes between random gates.DIY-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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Analog skew-able xfade-able LFO Eurorack Module capable of a plethora of waveforms in 3HPIt has three rate settings ranging from 3 minutes and 30 seconds a cycle up to audio range at 20 hz. Triangle waves can be skewed between ramps and saws, and square waves pulse width can be adjusted from inverted triggers to triggers. The LFO’s unique feature is voltage controlled cross fading through the (“Fade C.V.” in) between square/shark tooth\sine waveforms provided at the “Fade Out.” All outs are also influenced by the skew knob resulting in many complicated and asymmetrical possibilities at the “Fade Out.” It can even be self patched(ie triangle or square into fade cv) for an extended pallet of waveforms. The “Fade C.V.” in expects a bipolar voltage 10vpp to fade from square to sine with the fade pot at noon position. Bicolor led provides constant display of positive and negative voltage crossings.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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This is the panel PCB version of this kit.Analog skew-able xfade-able LFO Eurorack Module capable of a plethora of waveforms in 3HPIt has three rate settings ranging from 3 minutes and 30 seconds a cycle up to audio range at 20 hz. Triangle waves can be skewed between ramps and saws, and square waves pulse width can be adjusted from inverted triggers to triggers. The LFO’s unique feature is voltage controlled cross fading through the (“Fade CV” in) between square/shark tooth/sine waveforms provided at the “Fade Out”. All outs are also influenced by the skew knob resulting in many complicated and asymmetrical possibilities at the “Fade Out.” It can even be self patched(ie triangle or square into fade cv) for an extended pallet of waveforms. The “Fade CV” in expects a bipolar voltage 10vpp to fade from square to sine with the fade pot at noon position. Bicolor led provides constant display of positive and negative voltage crossings.DIY-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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VC F3DB stands for Voltage Controlled Fixed Filter Feedback Distortion Bank. The simplest description is it’s an analog 16hp six band voltage controlled fixed filter bank. But with the additions of so much gain, clipping, feedback, and self-oscillation it becomes a very flexible and unique gestural sound sculpting tool capable of; graphic equalization over 6 octaves, multi-band distortion, spectral processing, crude vocoding, multi-frequency envelope following, self-modulation, and even as an instrument on its own. With no input it can be used as a pseudo chaotic “harmonic” feedback oscillator.The filter frequencies were specifically chosen to emphasize more ambiguous and dissonant intervals. Although the frequency bands are spread out over many octaves I purposely tried to leave out “3rds” besides a major 10th at the top frequencies to even out all the dissonance below. But the frequencies aren’t exactly equal tempered, so it’s relative. The bands roughly equate to F2, B3, F#5, C6, F7, A8.The design is based on the Moog 914 filterbank, which it borrows the frequency bands from. But this circuit uses active filters with opamps inspired by YU Synth opposed to passive cells using inductors on the original. The 88hz is a low pass -24db/oct and 7k is a high pass -24db/oct, the rest are -12db/oct band pass filters all with a Q around 4.The hard and soft clipping circuit on the input is fairly standard which appears in many different iterations of classic guitar pedals. But it has a lot of gain and can even boost line level signals. What makes it a bit unique is the feedback on the clipping circuit which needs to be turned on by the GFB(gain feedback) switch and the amount can be controlled by the Gain FB pot which can add some fuzz/bite to the signal depending on which clipping switch is engaged or at the extremes it will self oscillate from audio rate to LFO sort of clicking range. All the clipping stages in the module are using silicon diodes.Consult the Signal Flow Chart to the left for a rough visual breakdown of the controls,in/outs,normalizations, and optional settings for the module.Each band can also be muted by the top toggle switches or clipped(at the VCA) by the top slide switch which makes this design a bit different than other filter banks. As well as the overall feedback section(bottom middle) takes the sum/all bands out through a VCA(controlled by the feedback pot and FB CV) back to the input gain/clip circuit. and you can also tap into this using different sends/bands to the FB In jack to break the normalization. With this extra feedback “resonance” you can get more whistley and howly filter sounds kinda like the Serge res eq, which can also go into self oscillation.All CV ins are expecting +5v to open the VCAs (they wont respond to negative voltage), once you get closer to +8v or so it can clip the VCA regardless of the gain settings or clip switches. Output amplitude in high gain settings will exceed 10vpp and can get up to 20vpp. The envelope followers tend to stay around 0-5v out, but with clip switch active they can go up to 10v.Since this is a high gain module there can be bleed between the bands in certain configurations and situations. Also in high gain modes with higher frequencies the 2.8k and 7k bands can bleed a little with the VCAs closed.This is a highly involved DIY all through hole project. It is a long build with 5 different pcbs to solder and assemble.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.