Mixer & Attenuation
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Features:7 signal hybridization algorithms• Crossfade.• Cross-folding.• Digital model of an analog diode ring-modulator.• Digital ring-modulation.• Bitwise XOR modulation.• Octaver/comparator.• 20 band-vocoder.Everything under CV control• CV control of modulation algorithm selection, with crossfading between adjacent algorithms.• CV control of each input's amplitude, with emulated analog saturation.• V/O CV control of the internal oscillator (when enabled).• For each algorithm, CV control of timbre richness/brightness/distortion.Built in carrier oscillatorAudio input 1 can be replaced by an internal digital oscillator with through-zero FM.Available waveforms: sine, triangle, sawtooth, pulse, filtered noise.DIY-Kit-Type:PCB only Kit. This is a do-it-yourself PCB kit, no parts or Panel are supplied, you will need to source them yourself.
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The AI011 Analog VCO is a robust and stable analog Eurorack VCO. Using the legendary curtis 3340 IC, the Oscillator provides buffered Triangle, Square, and Ramp waveforms, as well as a triangle to sine wave shaper to provide a sine wave output. The Eurorack VCO features both Coarse and Fine tune knobs for easy tuning. Pulse Width Modulation is normalled to the PWM input jack, so PWM is controlled with the PWM knob, and when a jack is inserted, the knob serves as an attenuator. Volt per octave and FM input jacks are present, with an attenuator for FM modulation. The VCO is capable of both hard and soft sync. An expander jack is present at the rear of the module for use with future AI modules.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 AI022 Harmonic CP3 Style Mixer is a discreet mixer using no ICs. As gain increases harmonics and analog warmth are added. As gain increases more, distortion and phasing is added, creating new waveforms from old ones.The AI022 takes inspiration from the legendary Moog Modular CP3 style mixer, but updates it for eurorack and allows for user customization of the circuit. Many Moog Modular users attribute the CP3 mixer module to providing much of the warmth of the Moog Modular sound.An exposed Bias knob allows abuse of the circuit, and allows for faithful replication of incoming audio, or radical analog wave shaping and distortion. It is also possible to use the Bias knob to adjust a +/- 5V signal into a 0/+ or 0/- signal.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 AI026 Eurorack Line Interface converts between +/- 2V line signals and +/- 5V Eurorack signals. This allows for the best headroom and highest quality when processing line signals with Eurorack modules, and vice versa.Features:• Stereo i/o• Left inputs are normalled to the right when no jack is inserted to the Right Input.• Volume control for Eurorack to line level signal conversion.• Volume control for line to Eurorack level signal conversion, with the ability to add gain/overdrive for non normalized signals.• Input and output jacksDIY-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 AI008 Matrix Mixer is an active, four in, three out matrix mixer with a summed output. The AI008 can be used to route any of the inputs to any of the outputs. This allows for the creation of feedback patches and other interesting routing, in addition to powerful "regular" signal routing. Common uses include mixing effects outputs into their inputs in order to create drones (or just good old fashioned feedback), mixing oscillators into their own PWM or FM inputs, modulating voltage controlled LFOs and other modulators into themselves, and other feedback patches. The AI008 Matrix mixes is a powerful way to expand any system!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 AI002 DIY Mixer Kit is an updated take on a classic utility audio or cv mixer. All three inputs have a level control, with full clockwise allowing full volume prior to the summing mixer. Perfect for adding audio inputs to a filter, or cv inputs to a cv input, and other mixing functions. This kit is ideal for those who know how to solder, but are still starting out in their DIY Synthesis journey.This diy mixer kit will not only familiarize yourself with IC Chips, Capacitors, and Resistors, it will also add a key utility module to your DIY Modular Synthesizer.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 AI007 Eurroack Quad VCA Mixer is a compact, high quality, and flexible way to control voltage (audio or CV) in your modular system). Each of the four inputs are DC coupled, allowing the amplitude of CV signals as well as audio rate signals to be voltage controlled. The outputs are also normalled together into a mixer, allowing the AI007 Eurorack Quad VCA Mixer to be used as a voltage controlled mixer. Once a cable is patched into a VCA output that output is removed from the mixer signal, allowing each channel to be used independently, giving users four VCAs in total. A dedicated knob shapes the curve response from Linear to Exponential.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 AI018 Eurorack Stereo Matrix Mixer is a compact 8-in, 8-out matrix mixer. A matrix mixer is used to route audio or cv signals from multiple sources to different destinations. There are sixteen potentiometers, with each potentiometer controlling the amount a given stereo input pair (1-4) will be sent to a given stereo output (A-D).A common usage for the AI018 would be as an effects send, with one or more inputs, and one or more effect inputs and outputs. Using the AI018 Stereo Matrix Mixer in this way, inputs can be sent to multiple effects, and the effects can be sent to each other, and even back into themselves, expanding the depth of the effects.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 AI006 Eurorack Stomp box Adapter is an updated take on a classic utility circuit that converts the higher signal levels of a modular system to be converted to the lower level signals that most stomp boxes are designed for.The AI006 stomp box adapter solves two problems. From the Synth input to the "FX"out, the signal is reduced by a factor of 20 to match the signal levels expected by most stomp boxes. From the "FX" input to the Output, the signal is increased by a factor of 20. Passive attenuators are present on both the send and return in case the input or output levels are too great.Features:• Level conversion: Takes Eurorack signals to guitar level signals suitable for guitar pedals.• Low noise: Maintains a clean and clear signal path, preserving the integrity of your sound.• Compact design: Fits conveniently into any Eurorack case with only 2HP required.• Easy to use: Requires no calibration or special settings, simply patch your Eurorack signals in and your pedal out.• Expand your sonic palette: Use guitar pedals to add distortion, overdrive, fuzz, delay, reverb, and other effects to your modular sounds.• Process modular sounds in new ways: Explore the creative potential of feedback loops, modulation, and other techniques using guitar pedals.• Create unique and experimental soundscapes: Combine the power of modular synthesis with the diverse range of effects available in the guitar world.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 AI010 Eurorack Attenuator is a 2 HP dual passive attenuator with switched jacks that allow the attenuator to also work as a multuple. The top-most input is normalled to the second attenuator knob and the third attenuator input. Control voltage is a wonderful way to add expression to a modular patch, and controlling that control voltage is crucial to being able to dial in that expression.A passive eurorack attenuator is a simple un-powered circuit using only resistive elements (usually a potentiometer) to reduce voltage. Rotating the potentiometer will change the output from 0V to 100% of the input without distorting the shape of the incoming voltage. These are simple and primitive, but effective and important methods of controlling voltage, be it the input to a Filter, or the Linear Frequency Modulation input on an Oscillator.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 AI106 West Coast Mixer is a fully discrete mixer design that updates vintage West Coast synthesizer mixer designs into a modern form.The AI106 West Coast Mixer takes inspiration from vintage mixer circuits from 60s and 70s West Coast synthesizers, but updates it for eurorack and allows for user customization of the circuit. True to original circuits, the output is inverted. Audio rate signals will sound about the same, but cv signals will be inverted.Because "West Coast" Synthesis focused more on waveshaping and Complex VCO structures as opposed to Subrtacting frequencies from simple waveforms (East Coast), mixers are an important part of traditional West Coast synthesis techniques.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 AI016 Eurorack Tape Echo Interface is a limited edition module that uses a pre-amp and buffered feedback loops to allow a standard three head tape recorder as an analog tape echo. It also provides op-amp saturation on the input when pushed.The tape recorder must have three heads (erase, record, and play) for it to work as a tape echo. This type of tape recorder will have a button or switch that allows the monitoring of the source audio, or what has just been recorded to the tape. The space between the record and play head creates the delay, and the Tape Interface feeds back into the unit to create repeats.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 Rabbit Hole 6HP Expander adds two additional input channels to your system, offering enhanced routing options. Each channel can be sent directly to Rabbit Hole or used independently as a standalone VCA. When operating in standalone mode, both channels are normalled to sum at the bottom output for flexible signal processing. Gain CV is also normalled from Rabbit Hole for seamless integration.Features:• Expander for Rabbit Hole• 2 inputs with vintage character OTA VCA• Each channel can be used as a standalone VCA• Attenuverters for CV inputs• All analogue signal pathDIY-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 IOU (Invert Offset Utility) is a powerful 2HP tool for shaping control voltages and audio signals with accuracy. It features an attenuverter and a responsive slider to dial in up to +5V of offset—ideal for fine-tuning signals in both performance and studio settings.A standout function, inspired by DivKid, lets users switch the offset point to either pre or post attenuverter. This enables more refined control when crafting detailed offsets across the full slider range.For added flexibility, IOU includes a selectable gain switch (1x or 2x), allowing for signal boosting or expanding the offset range up to +10V.With both normal and inverted outputs, IOU excels at tasks like voltage scaling, inversion, and generating custom CVs—perfect for techniques such as sidechain-style modulation. A must-have utility for any Eurorack system aiming for precision and creative depth.Features:• Low Output Impedance (0.5 Ohm): Ensures a high damping factor for precise control and outstanding low-frequency performance• Universal Headphone Compatibility: Supports a wide impedance range from 16 to 600 Ohms• Multi-Stage Low Noise Design: Delivers low distortion and high stability for accurate, true-to-source audio reproduction• High Output Current (up to 140 mA): Capable of driving power-hungry headphones up to 600 Ohms with ease• Visual Feedback: Dual 8-segment LED program level meters for monitoring input signal levels• Output Flexibility: One output can be used to drive monitor speakers (using a Y-splitter)• Full-Spectrum Audio Fidelity: Offers a 20 Hz to 20 kHz frequency response for complete audio coverage• Protection Features: Includes comprehensive RF and DC input protection and resettable fuses for short-circuit output safetyDIY-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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Developed with DivKid, Manic is a compact 8HP dual VCA module built for advanced sound sculpting. It supports mono, dual mono, or true stereo workflows with precision linear VCAs and selectable unipolar or bipolar response—ideal for amplitude shaping or ring modulation.Each channel features a dedicated post-VCA shaping stage:Shape1 delivers TanH soft clipping and classic Serge-style wavefolding.Shape2 adds hard clipping and a Buchla-inspired wavefolder.The asymmetrical design between channels creates rich, animated stereo effects from mono or stereo sources—perfect for depth and width in modular mixes.Optimized for both CV and audio, Manic is a performance-ready tool that brings hands-on control, creative modulation, and stereo imaging into any Eurorack setup.Features:• A collaborative design from both DivKid & Apollo View Modular• Selectable unipolar or bipolar VCA circuitry per channel• Three distinct shape outputs per channel: Inverted, Clipped, and Wavefolding• TanH soft clipping & hard clipping• Serge style wavefolding & Buchla style wavefolding• Stereo operation with perfectly matched gains for the clipping and wavefolding circuits, creating a stunning stereo widening effect• DC-coupled signal path for processing both audio and CV signals• Input and modulation normalisations for simple mono to stereo operation• Flexible signal flow allows for creative combinations, such as ring modulation into clipping or wavefoldingDIY-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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Rabbit Hole is a 16HP summing mixer that blends solid-state precision with rich tube character. Featuring two input channels with independent vintage VCAs, it routes signals through a drive stage for solid-state clipping, followed by a starved cathode dual-triode vacuum tube for saturated warmth and harmonic distortion. An optional OWTH diode LED clipping circuit adds aggressive, dynamic edge.Features:• 2 channel mixer with vintage character OTA per input VCAs• 12AU7 Vacuum Tube Core• Fat sounding all analogue signal path• 4 possible stages of distortion• Tone shaping with CV control• Dry/Wet Mix with CV control• Feedback with CV control• Attenuverters on all CV inputs• Switchable diode clipping circuit “OWTH - Off With Their Heads”• “L8” Switch to change Tube characterDIY-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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Expand the power of your modulations with the MMx2, a dual-pack module designed to bring flexibility and creativity into your system. Each MMx2 package contains a pair of MM modules.Sold as a pair, MM modules can function as two separate units or be linked for expanded matrix mixing capabilities. Connect even more MM modules to increase the power of your Eurorack synthesiser!Every MM module has attenuator on the first two inputs and attenuverters on the last two and the MM modules amplify the mixed output by 2.The MMx2 merges essential utilities into one powerful package, offering a CV mixer, attenuverters, signal amplification, offset generator, and a multiple, all in a compact form. Ideal for distributing modulations, creating complex mixers, generating stereo effects, and much more.The MMx2 is a testament to AtoVproject's dedication to creating instruments that allow you to express yourself and reward your understanding and exploration. To facilitate this, the MMx2 comes with a detailed manual full of inspirational patch ideas that will take your sound design to the next level.Dive into the world of advanced modulation manipulation with MMx2.Stay inspired! Stay innovative!Features:• Sold as a pair• 4 in 1 DC Mixer• Multiple MMs can be combined into a matrix mixer• Optimized for CV - Audio compatible• Input 1 and 2 have attenuators• Input 3 and 4 have attenuverters (polarizers)• Input 1 to 3 can be chained to the next module Input 4 is normalled to a voltage source so it can be used as offset controlDIY-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 2025 version! A*B+C is the ultimate utility for audio and control voltage. It performs multiplication, addition, and attenuation, providing a simple way to create complex signal interactions and timbres.It is formed by two channels, each of which takes two input signals (A and B), multiplies them (A × B), and then adds a third signal (C) to the result.It is formed by two channels, each of which takes two input signals (A and B), multiplies them (A × B), and then adds a third signal (C) to the result.Features:• DC Coupled• Signal LED Indicators• B and C INs normalled to 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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Quad Attenuator/Inverter, Splitter, and Offset GeneratorScale your audio or CV sources and route them to various destinations with this versatile utility. It consists of four identical unity gain amplifiers. Each amplifier can multiply an incoming signal by values ranging from 0 to 1 (for attenuation) or from 0 to -1 (for inverting attenuation). The input of each channel is normalled to the input of the next channel, allowing for easy signal routing from one input to the subsequent ones.The first channel is normalled to 10V, enabling the module to function as an offset generator when no input is connected.Features:• Inversion switch per channel.• Precise zero at the left side of the pots.• Four level LEDs indicate output level and polarity.• Cascaded input topologyDIY-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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Bandit is a spectral processing playground. It's a fun combination of band-pass filters, VCAs, and routing options. It serves multiple functions including equalizer, crossover, multiband VCA, 4 band spectral mixer, and spectral external FX insert point.Features:• Four Band CV controllable EQ• Individual inputs per Band• Return inputs• Level and Peak LEDsDIY-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.