ADDAC System
Instruments for sonic expression. From Portugal with Love!
ADDAC System is a modular synthesizer brand from Lisbon, Portugal. They excel in creative designs that skillfully incorporate digital technology while respecting the controllability of analog modules. Their modules offer advanced functionality without sacrificing intuitive operation.
Factory Built
/ Ready-to-use completed modules
High-function random voltage generator with 4 independent CV/Gate outputs, offering flexible control over probability, distribution, and quantization.

Provides 2 send/return loops for pedal integration. Equipped with 3.5mm and 6.35mm jacks with optimized signal levels.

Provides 3 channels of 6.3mm to 3.5mm jack conversion. A passive module requiring no power, ideal for system expansion.

Module integrating 5-channel VCA and mixer. Each channel features linear/log switching, solo/mix/mute switching, and individual outputs.

Stereo discrete mixer. 3 stereo + 1 mono inputs with pan and gain controls. Design allows adding distortion for sonic character.

3HP module for bringing external stereo signals into a modular environment. Splits 3.5mm TRS input into left/right mono outputs and converts line level to synth level.

Small utility for routing modular signals to external stereo equipment. Combines L/R mono signals into 3.5mm TRS stereo output with level conversion.

Pedal that outputs +5V gate signals via foot operation. Equipped with 3.5mm jack, runs on 9V battery for easy portability.

3-channel pedal ideal for modular and looper integration. Outputs +5V gate via 3.5mm, flexible design powered by 9V battery.

Records, loops, and processes audio with real-time control of speed, pitch, and granular processing. A CV-controllable complex audio processor for freely deconstructing and reassembling sound.

Standalone frame for the ADDAC112. Enables use of the looper & granular processor without a Eurorack case. Dedicated design with power supply and controls.

Module that converts input signal volume changes to CV, with gate-controlled envelope output. Reflects the dynamics of external sound sources across your entire patch.

Simple utility module for manually generating gate signals. Multiple channels for flexible live performance and improvisational patching.

Utility module for controlling latch states via button operation. Provides convenient switch functions for holding and toggling gate signals.

Module that converts 4 gate signals to trigger signals. Provides conversion for patches requiring short pulses, enabling more versatile gate signal handling.

Development platform for Eurorack electronics enthusiasts. Breadboard equipped with all components needed for Eurorack development.

4-channel quantizer with intuitive button operation that lets you use it like an instrument. Packed with chord generation and advanced features for deep exploration.

Synth voice module optimized for acid sounds. Built-in VCO, VCF, and VCA reproduce TB-303-style sounds in a modular environment. Versatile input and CV control.

High-precision analog VCO using the CEM3340 chip. Features 6-octave switching, PWM, and FM input, combining stability with versatility.

Dual multimode filter with flexible series/parallel configuration. Convenient for stereo LFO modulation, and impressively compact.

Percussive sound source module utilizing T-network filters. CV-controllable decay per channel for generating diverse drum and percussion sounds.

Noise-driven 4-voice drum module. Generates snare and hi-hat-like sounds, adding gritty texture and character to rhythm tracks.

Preamp module with classic tone. Designed to add warmth and thickness, introducing vintage-like texture into your Eurorack environment.

Effect module that adds unique clipping to input signals. Emphasizes harmonics and brings analog saturation to your modular system.

Multi-function utility with 2-channel sample & hold circuit plus noise generator. Ideal for CV modulation and random signal generation. Also features Track & Hold and Slew Limiter.

Versatile mixer for flexible addition/subtraction/averaging/offset of two input signals. Two pairs of 2-channel summing bring your CV processing ideas to life.

CV processing module that maps input CV to different output ranges. Expands the expressiveness of your modular system by reshaping and converting multiple CVs.

2-channel attenuverter (attenuator with polarity inversion) module. Handles everything from fine CV adjustment to signal inversion control.

Power supply delay unit for sequenced module power-on.

DIY Kits
/ Build your own from a soldering kit
Stereo discrete mixer DIY kit. 3 stereo + 1 mono inputs with pan and gain controls. Design allows adding distortion for sonic character.

Utility module for controlling latch states via button operation. Provides convenient switch functions for holding and toggling gate signals.

Multi-function utility with 2-channel sample & hold circuit plus noise generator. Ideal for CV modulation and random signal generation.

CV processing module that maps input CV to different output ranges. Expands the expressiveness of your modular system by reshaping and converting multiple CVs.

Simple utility module for manually generating gate signals. Multiple channels for flexible live performance and improvisational patching.

High-precision analog VCO using the CEM3340 chip. Features 6-octave switching, PWM, and FM input, combining stability with versatility.

Noise-driven 4-voice drum module. Generates snare and hi-hat-like sounds, adding gritty texture and character to rhythm tracks. Self-build kit.

Percussive sound source module utilizing T-network filters. CV-controllable decay per channel for generating diverse drum and percussion sounds.
