ADDAC511

At ADDAC System we love all sources of unpredictability be it by randomness or signal complexity. This module greatly expands on the principles of our ADDAC501 Complex Random from 2013.

This is a fully fledged 4 channel voltage generator capable of all things random, with quantization, probability, distribution, interpolation, time control, clock, states and a 32 step sequencer.

The module panel features a screen for parameter editing, and each button offers access to a single page of changeable parameters. This allows for a fast and fluid workflow across all settings so users can focus on their music. The combination of two encoders along with push buttons allow swift navigation and editing across all pages and their respective settings.

FEATURES
4 independent channels with bipolar CV / Gate outputs and  Clock Input that allow all things random.  
Each channel can be set to generate either continuous Voltages, Envelopes or as a Quantizer.
Controls over Voltage Range, Quantization with custom scales, Probability, Distribution curves and Smoothing, plus time and bpm ranges, time distribution curves and several clock sources.
A 32 step sequencer per channel that can work completely independent or in sync.
Mutes and Holds per channel.
3 States per channel allow very fast settings changes, from smooth to drastic transitions.
8 Assignable CV inputs and 4 Gate inputs can be internally mapped to any setting of any channel.
3 configurable Logic / clock outputs allows complex logic events comparing different ins & outs or as clock outputs.
Average CV output of all 4 CV outputs. Easy VCO tuning available in the Menu.
Calibration and mapping of all 4 CV outputs is also allowed through the Menu

Tech Specs:
20HP
4.5cm deep
200mA +12V
100mA -12V

Note: All specifications and features are subject to change without previous notice.

Music Radar review:
https://www.musicradar.com/music-tech/addac511-vc-stochastic-voltage-generator-review

In case you're wondering: Sure! We can get you a custom coloured front panel for the ADDAC511.
It has an additional cost and takes 4 to 6 weeks to be ready.

At the moment the ADDAC511 standard panel colour is Black.

A custom colour panel can be done in either Red, Green, Blue, White, Silver Gray, Yellowed Silver, and Dark or Light Bronze.

Print colour varies between Black, White, or Red, Blue and Green. We recommend lighter-tone print for darker panels, and vice-versa.

Please note: we don’t stock custom coloured panels. For every custom order we need to make a single panel order from our panel provider. This explains the panel price and lead time.

Thanks for your interest in the ADDAC511!

To proceed with a direct purchase, you may fill out the form on our Orders Page.

If you want to obtain it through a shop closer to you, this is our Distributors Page.

Visit this page for Firmware updates or Presets Backup:

https://media.addacsystem.com/ADDAC511

Current revision: STABLE BETA 2.0
Release date: April 6th 2026

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INTRODUCING BOOTLOADER & FIRMWARE 2.0

For this update user's need to update the Bootloader first and then update the firmware.
Updating only the firmware will cause issues when running the module.
This Beta is very stable however if you experience any bug please report it back to us.

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Updating to BOOTLOADER 2.0:
Using the Chrome browser go here and follow the steps on the webpage:
https://addacsupport.github.io/ADDAC511-bootloader/

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Updating to FIRMWARE 2.0:
Using the Chrome browser go here and follow the steps on the webpage:
https://media.addacsystem.com/ADDAC511/index_dev.html

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Firmware revision 2.0 Release Notes:
New: External Clock Multiplier/Divider features- More options when using external clocks.

New: Tracker style sequencer view - A new sequencer vertical visualization allows for faster editing and overall view

New: Random Gate Length - A new option in the [GATE OUT] screen allows to add random length to the gate output.

Fixed: Several other reported bugs

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Thanks to all users who reported bugs!
If you think you found a bug plese report it to us and we’ll look into it.
Please always give a clear description on how to reproduce the error consistently.
Videos are always appreciated.

Product Safety Information

Eurorack Module

Important Safety Information
This Eurorack module is designed for use within standard Eurorack synthesizer systems and is intended for adult users familiar with modular synthesis and electronic equipment.

Please read this safety guide before installation or use.

General Warnings
1. Electrical Hazards:
• Ensure the power supply matches the module’s specified voltage and current ratings (refer to the product manual). Incorrect voltage can damage the module and pose a safety risk.
• Never connect or disconnect the module while the Eurorack system is powered on.
2. Heat Generation:
• The module may generate heat during operation. Ensure proper ventilation within your Eurorack case to prevent overheating.
3. Sharp Edges:
• The module’s faceplate and components may have sharp edges. Handle with care to avoid cuts or scratches.
4. Small Parts:
• Contains small parts that could pose a choking hazard. Keep away from children and pets.
5. Compatibility:
• This module is designed specifically for Eurorack-compatible systems. Connecting it to non-compatible systems may result in damage or malfunction.

Installation and Use
• Mounting: Secure the module properly in the Eurorack case using the provided screws.
• Power Connection: Verify the polarity of the power cable before connecting to avoid damage to the module or power supply. Use only the included or manufacturer-recommended power cable.
• Operational Use: Follow the module's user guide for instructions on operation. Do not exceed the input/output limits specified.
Maintenance and Handling
• Inspection: Regularly check for loose connections or signs of wear.
• Cleaning: Disconnect the module from power before cleaning. Use a dry or lightly damp cloth; avoid using solvents or water directly on the module.
• Repairs: Do not attempt to repair or modify the module yourself. Contact the manufacturer for support.

Environmental Safety
• Dispose of the module, its components, and packaging in accordance with local electronic waste regulations.

Liability Disclaimer
• The manufacturer is not responsible for any injury, damage, or malfunction resulting from improper installation, use, or modification of this product.

Contact Information

For further assistance, contact our support team at:
Addacsystem, Lda.
addac[at]addacsystem[dot]com