Modular
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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.
sold out at the moment
This is the panel PCB version of this kit.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: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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The Vnicursal VCA is an 6 Channel VCA Eurorack Module in 8 HP. It the smallest, most compact Voltage Controlled Amplifier in the Eurorack market. It provides 6 OTA(LM13700)-based DC Coupled Linear VCAs for Audio or CV. The 6 VCAs are summed together so it can be used as a voltage controlled mixer. Each VCA is normalled to the sum so they can be removed from the mix and used on their own. The potentiometers control the amount of gain, and when a voltage is inserted into the CV in the potentiometers act as attenuators. With a control voltage of 5 volts the VCA will be at unity gain, anything above that can clip the input. LED brightness with or without CV in provides constant feedback of each channels amount of gain.The Vnicursal is not a perfect scientifically spec’d VCA. Analog VCAs can only close so much, or be so silent. In certain situations based on power supplies and gain stages the VCA can experience some bleed or noise mainly at the sum out as all channels are passively summed then buffered.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
Achordion is a chord-crafting, quantizing wavetable oscillator for Eurorack. It combines 37 smoothly transitioning wavetables with up to 18 simultaneous voices, producing anything from clean single tones and warm pads to dense, detuned walls of sound.Four playing styles – single tone, chords, arpeggios and intervals – make harmony immediately playable. Notes are quantized to a selectable scale, so the module can handle the underlying music theory while remaining intuitive for live performance and experimentation.Two independent 1V/oct inputs create separate melodic lines, and two audio outputs can either carry those lines independently or mix them when only one output is patched. Dedicated controls and CV inputs for wavetable, tone, detune and chord selection, together with an eight-LED display, keep complex voicings easy to navigate.Features• Quantizing wavetable oscillator and chord generator• 37 smoothly transitioning wavetables in four banks• Up to 18 simultaneous voices• Sub-octaves, duplicated tones and chords• 4 modes: single tone, chords, arpeggios, intervals• Quantization to a selectable scale• Dual 1V/oct inputs and dual audio outputs• 8 LEDs visualize parameters and settings• Open-source Rust firmware on Daisy Patch SM• 10 HP, skiff-friendly Eurorack moduleDIY-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
Arplus combines a quantizer, CV-controlled arpeggiator and six-voice Karplus-Strong string synthesizer in a single Eurorack module. Its 31 scales range from Western diatonic modes to Arabic maqam, Indian melakarta, Japanese pentatonics and even quarter-, semi- and whole-tone divisions.The arpeggiator creates evolving patterns from the selected scale and chord, while the quantized 1V/oct output can drive other oscillators. Chords can contain up to eight notes, scales can be customized and parameters without dedicated CV inputs can be assigned through flexible CV mapping.The internal physical-modeling engine can pluck or bow up to six virtual strings, using either its internal excitation or an external audio burst. A resonant filter, contour control and three stereo routing modes shape sounds from tight staccato plucks to wide, sustained pads and resonating soundscapes.Features• Quantizer, arpeggiator and string synthesizer• 6-voice Karplus-Strong physical modeling• External audio input for custom excitation• 31 scales including microtonal scale families• Customizable scales and chords of up to 8 notes• CV-controllable arpeggiator patterns• Quantized 1V/oct output• Flexible CV mapping• Three stereo output modes• Resonant filter and adjustable contour• 20 HP, skiff-friendly Eurorack moduleDIY-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
Kaseta is a multi-purpose Eurorack module inspired by reel-to-reel tape machines. It models magnetic hysteresis for warm tape-style saturation and provides four independent, freely positioned reading heads that can create conventional echoes, rhythmic patterns, looping textures and complex feedback networks.Up to five minutes of audio can be recorded. Dedicated tone, wow and flutter controls shape the tape character, while individual head controls and stereo panning turn the four taps into a flexible spatial delay. The preamp can move from attenuation to strong drive, and saturation can be pushed beyond its normal limits for harsher distortion.Four assignable control inputs make nearly every parameter voltage controllable. Kaseta also includes an internal 1V/oct oscillator and a trigger sequencer derived from the delay heads, allowing it to work as a delay, sound source, rhythm generator or modulation utility.Features• Four-head tape-style delay• Up to 5 minutes of audio recording• Magnetic hysteresis saturation simulation• Tone, wow and flutter controls• Individual head position, speed, feedback, volume and pan• Stereo output• Four assignable CV inputs• Internal voltage-controlled oscillator with 1V/oct tracking• Trigger sequencer and impulse output• 24-bit / 48 kHz audio• LED parameter visualizationDIY-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.