Instruments for Sonic Expression


Comparator & Rectifiers
100,00 €


Prices shown exclude VAT, outside EU all orders are VAT free.


A Comparator is an electronic circuit that compares two voltages and switches its output to indicate which is larger. The Comparator operates between -10 or +10V
The Output is always -10V if below Threshold and +10V if above Threshold.
A Rectifier is an electronic circuit that is used to transform AC signals to an equivalent DC signal while removing one of it’s polarities, i.e. Positive rectification excludes negative signals and vice-versa.
Both sections can be used to change the shape of any waveform as well as its harmonic content.
1 Comparator Threshold Knob
1 Comparator Jack Output
2 Comparator Monitor Led1 Common Signal Jack Input
4 Rectificated Outputs
4HP totally analog module.
Comparator with Threshold Knob
4 Precision Rectificated Outputs::
   - Positive Half Rectification
   - Positive Full Rectification
   - Negative Half Rectification
   - Negative Full Rectification
Comparator can be used with VCO’s to create a Square Wave with PWM control 
Comparator can also be used with complex audio signals for a “Fuzz” effect.
Full Rectification can be used to double a VCO frequency.


Format: Eurorack
Width: 4 HP
Depth: 2.5 cm
CV inputs: ± 10v
CV outputs: ±10v
Max current: 30mA
Compatible with +-12v and +-15v power supplies
Bus Board Cable: 8 × 2 IDC (Doepfer style) connector

Interactive Users Guide

In order to better illustrate the behavior of this module we developed a javascript app for potential users to test and better understand the module’s inherent features.

This guide features all the functions of the real hardware module plus a graphical display that resembles an oscilloscope and a very simple sound engine as if the module output was plugged straight into the CV input of a VCO.

The audiovisual experience of using this application makes it a very effective demonstration of the module’s operation.