Sound Sources
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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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Multi Channel Sound SourceVCOs are probably the most popular modules in the Eurorack world.At its most common form, an oscillator module creates different basic waveforms by shaping its core, which gives us several timbres sharing the same frequency.On Sena, we decided to reorganize those principles. We have the basic waveforms as on any VCO, but each has an independent core and frequency control. In addition, the tuning inputs of each channel are daisy-chained, allowing to create easy transpositions or detuning between them.To maximize stability and tracking accuracy, every channel is designed around the famous 3340 oscillator core, present in many legendary synths like the Roland SH-101 and Jupiter-6, Oberheim OB-Xa, and the Sequential Prophet-5.On top of that, the module counts with four dedicated CV-controlled Modifiers to extend the timbral range of each core: a two-stage Folder for the Sine, a Trapezoid shaper for the Triangle, a Phase modulator for the Saw, and a half-range Pulse-width modulator for the Square.The addition of a complete analog Noise Bank makes Sena a super powerful and compact sound source. A cornerstone for any Eurorack setup.Features:• Fully analog VCO circuits: Sine, Triangle, Saw and Square• 1V/Oct pitch tracking over eight octaves• Dedicated CV controlled Wave Modifier on each oscillator• Daisy-chained Freq inputs with onboard buffers• Selectable LFO mode per channel• Analog noise bank with White, Pink, Blue and Brown circuitsDIY-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.
sold out at the moment
Drums are the heart! AD110 is a 6-voice analog drum module inspired by the vintage Japanese machines with the same number. The module produces 6 voices; kick drum, snare drum, hand clap, closed hi-hat, open hi-hat, and ride cymbal, all of which are contained in a very compact 16 HP Eurorack module!Knob colors might differ from pictures, currently not all parts are available from time to time.Kits packed according to revision AKFeatures• Faithful recreation of all 6 DR110 voices outputted in Eurorack signal format.• Additional tone adjustments beyond the standard DR110 settings: Kick pitch/resonance, Snare pitch/decay, Cymbal decay, and Clap spread/reverb.• Individual outs + mix out with accent input.• All through-hole parts (DIY Version) and no rare 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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Bass and more! B2 contains everything you need to create deep, thumping kick drums or cutting bass lines in one compact 14HP unit: A 1 V/Oct VCO with 4 waveforms, a 3-way waveform mixer with sub-octave sine wave, 2 fast, switchable AR/AD envelope generators, a high quality VCA, and a multi-mode VCF for additional tone shaping!Knob colors might differ from pictures.Kits packed according to Revision AENew features of B2 from B1• New reset/trigger circuit and faster minimum attack times (~25uS) without artifacts• Sub-octave sine• Wave select saw or 2x saw• New VCF with LP/BP/HP selection• Stable voltage references for VCO stability under power supply fluctuations• All OTAs are LM13700 for easy parts sourcingDIY-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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TZ0 Thru-Zero VCO. Classic analog sound with TZFM! TZ0 is an analog Voltage Controlled Oscillator module in Eurorack format. TZ0 is a triangle-core VCO which is capable of thru-zero linear FM. This VCO has been engineered for extremely good 1 V/oct response over a large tuning range and great thermal stability.Knob colors might differ from pictures.Kits packed according to Revision AGFeatures• Thru-Zero Linear Frequency Modulation.• 5 wave shapes: Sine, Triangle, Sawtooth, Square, & Pulse.• Extremely good tuning linearity.• Built-in high frequency compensation.• Hard Sync input (reset type).• Built in VCA for modulating Linear FM signal with an envelope.• Robust old-school design with mostly 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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Twins that dance in and out of phase, never completely together but never fully apart, bound to each other in the infinite universe.Castor & Pollux is a dual oscillator that echoes back to the legendary Roland Juno but shines with its own unique, massive voice. It contains two digitally-controlled analog oscillators implemented using a faithfully modernized version of the original Juno 106 design. It builds on the classic ‘80s sounds of its inspiration by using the second oscillator and internal LFO to layer in thick detuned sounds and harmonically complex hard synced waveforms.Castor & Pollux II brings a redesigned interface and moves individual waveform outputs to an included expansion. Both versions have the same features and use the same firmware.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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Basilisk is a new bass-line exploration synthesizer from Wirehead Instruments, with dual digital oscillators driven into an aggressive MS20-style analog filter coupled with a powerful generative sequencer.Whether you need thumping bass-lines, melodic leads, or percussive tribal beats, the Basilisk is ready to lead you down the rabbit hole from the moment you power it on.The dual oscillators include saw and square/pulsewave, with manual & LFO control over PWM, detune, pitch envelope & glide.The analog filter has a fat saturated drive stage with resonance that can go from subtle to squelching to screaming, and the external audio input can process instruments from your desktop or EurorackAll of this can be sequenced and modulated by the attack/decay exponential envelope, multi-waveform/multi-destination LFO and Elektron-style parameter-locks.The Basilisk is powered by a 1-16-step generative sequencer evolved from the Freaq FM, with multiple algorithms. Explore deep space, underground caverns, deep jungle or 1980s suburbia!Features:Oscillators• 2 digital oscillators - saw, square & pulse• De-tune control that always stays musical, from light flanger to rich chorus, dial it up for fat fifths and octavesAnalog Filter• MS20-style 12dB resonant multi-mode filter• Analog filter drive from -20dB to +20dB saturated overdrive• Low-pass and non-resonant high-pass mode• Digitally-controlled cuttoff modulation• External audio input accepting wide range of signals from 1v p-p to 10vp-pModulation• Attack/Decay envelope with shape control, routable to filter cutoff and/or pitch• LFO with multiple waveforms and configurable destination: cutoff, envelope (attack, decay or depth), note • length, PWM, detune, octave or sequence length• 6 modulation lanes with full 16-step parameter-lock recording of synth parametersGenerative Sequencer• Generative sequencer with 1-16 steps• Multiple generative algorithms including scale-notes, runs, scale-arpeggio, call/response• Sequence mutates/evolves at user-defined rate & note-density• Selectable tonic, octave & scale• Tap-tempo control• Analog sync input & output (Volca, PO or Eurorack compatible with 1/2/4 steps per pulse)Patch Memory• Persistent patch memory saving all digital synth and sequence parametersHardware• Mono audio output (32KHz 14-bit DAC, 4v p-p)• Sync input / output (0-5V rising-edge) • Audio Input (1v p-p to 10vp-p)• Powered by an Arduino Nano V3!• 142m (w) x 100mm (d) x 40mm (h)• 9-12V DC or micro USB powered (70mA @ 12VDC)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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The Dual VCO is a 4 HP Dual Voltage Controlled Analog Oscillator Eurorack Module.Each VCO has square, triangle, and sine wave out, coarse and fine tuning controls, a control voltage input, and a switch for selecting exponential or linear cv in. When a control voltage is inserted, the fine tune control becomes an attenuator for the incoming voltage. In exponential mode, when the attenuator is fully clockwise, the VCO will track around 5 volts per octave.The dual vco currently ships with the black/white pcb 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
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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The Trepanator is a 14 HP analog “Bent by Design” experimental instrument featuring a Dual VCO, Difference Rectifier, 3-band EQ, Sample/Track and Hold, and SVF (state variable filter) all built into one nonlinear module. Its origins trace back to a love for Rob Hordijk’s Benjolin and patching a similar pseudo chaotic feedback-based instrument from scratch using all Zlob modules.Although not based on Hordijk’s circuit or signal flow, it uses a similar architecture of dual voltage controlled oscillators, an “interference pattern generator,” a state variable filter, and internalized cross-patched feedback. Instead of a Rungler and comparator the Trepanator uses a sample/track and hold with slew, a difference/rectifier circuit (based on NLC), and a self-oscillating 3-band EQ. Utilizing this excessive feedback between the VCO’s, EQ, S/H, and SVF, creates a completely new instrument for discovering abstract electronic sounds. The Trepanator is a highly interactive, unpredictable, and an immediate instrument capable of a huge range of organic and sounds from: snarling, plucking, bubbling, screaming, gurgling, hissing, grunting, pinging, and quacking, to machine like rhythmic loops, circuit bent broken modem sounds, no-input mixer screeching, intermittent short wave radio fizzling, and full on Harsh Noise Wall all within the touch of a fader or a small knob turn without any external audio or any control voltage in.Double Sided PCB panel with Classic and Soulless.For more info consult the manual below and signal flow chart.RIP Rob HordijkDIY-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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The Triple Cap Chaos(C^3 Chaos) is a 2hp analog, chaos based, noise oscillator, pseudo ring modulator/harmonics generator, and audio mangler.It is a unique module, like the Diode Chaos, because it has never existed as a musical instrument until now. There is also no other module to my knowledge that can do exactly what the Triple Cap can do. The circuit(with several modifications) is based on the paper “Simple Autonomous Chaotic Circuits” by J.C. Sprott and Jessica R. Piper. As opposed to the Diode Chaos that generates control voltage this module focuses on the audio rate.The “Emanate” potentiometer controls the coarser overall spectrum of the chaos, from lots of activity counter clock wise up to less chaos and more of a steady oscillation. The “Width, CV ATT” potentiometer can be thought of as more of a fine control for the chaos/oscillator. When something is inserted into the “CV” in the voltage normalization from the width knob is broken and the potentiometer now acts as an attenuator for the incoming cv. The Triple Cap is not a traditional volt per octave exponential VCO, and has a sort of narrow frequency range to exploit the chaotic behavior.It expects a +5v to -5v max signal in to modulate the chaos. The “IN” jack is an A.C. coupled input for audio in, although cv and audio can work for both the “CV” in jack and “IN.” The “IN” will interfere and interact with the onboard chaotic oscillator depending on the frequency of the input, which may take some experimentation. It can create ring mod ish sounds, to added harmonics, to almost bit crushed sounds depending on the “X” or “Y” output. The “X” output is a more windy noisy sinusoidal based output and the “Y” output is more squared off and aggressive, harsher sounding output.Some quirks about the Triple Cap: The “X” output can offset negatively or positively a little bit depending on the pot settings, but both outputs tend to stay around 10vpp. With the “Emanate” and “Width” pots all the way up the typical frequency will be around 150hz although some will reach 200hz at this setting. With the “Emanate” pot full counter clock wise “Width” pot full clock wise the frequency will be around 250hz. It is possible to send signals into the triple cap that can bring it out of the desired range causing the oscillation to cut out.The Triple Cap has a double sided panel. meaning one side has the classic graphics and the other is Soulless with less graphics.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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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.
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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.