ADDAC System Brings The Sound Of Analog Style Drum Machines To Eurorack

This new 8HP ADDAC 104 Eurorack module is inspired by Twin T-Networks circuits, as used in legendary drum machines. Here's what you need to know about it.  

Lisbon, Portugal, November 11, 2019 — Following the success of the ADDAC103 T-Networks comes a new Eurorack module which is also inspired by Twin T-Networks circuits used in many legendary, analog style drum machines. The new ADDAC System 104 is a simple 8HP, 4 voice module with frequency controls for each of the voices.

The new module also features CV inputs with attenuverters for each voice frequency. Due to the circuit specifications, and to keep the module at a low price, these CV inputs are not calibrated to 1v/octave.

At each voice input, there is a gate to trigger converter, so any input source is possible.
In this case, audio inputs can also be used as inputs, and due to the nature of the gate to trigger converter, each voice can be used as very destructive filters giving users a range of sonic options.

Module features 4 voices, each with:

Frequency control, with CV input and attenuverter
  • Frequency range switch (low/medium/high)
  • Trigger input
  • Audio output
  • The unit also features a summing mix output with volume control.

Pricing And Availability

The ADDAC 104 is shipping now at a cost of €160. Further, ADDAC System is able to custom color the front panel for an additional charge of €55 (Red, Green, Blue, White, Silver Gray, Yellow, or Gold).  The unit will also soon also be available as a full DIY kit.

For more information, please visit

Learn to be a Eurorack master:

Hollin Jones was classically trained as a piano player but found the lure of blues and jazz too much to resist. Graduating from bands to composition then production, he relishes the chance to play anything with keys. A sometime lecturer in videographics, music production and photography post production, Hollin has been a freelance w... Read More


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