Equation Composer

8-bit sounding melodies, waveforms, and noise

Equation Composer by Microbe Modular. Inspired by VIznut's "Algorithmic symphonies from one line of code" and the BitWiz Audio Synth, the Equation Composer creates a wide range of gritty, 8-bit sounding melodies, waveforms, and noise. The module is organized into CV selectable "programs" that range from simple equation playback to stuttery loops, and even wavetable playback and subtractive synthesis.

Internally, the Equation Composer is based on the powerful Arduino Due. Although the module has been built to be enjoyed "as-is", there's a prominent USB jack on the front for easy re-programming, and the software is open source and available on GitHub. 14 extra pins have been brought to an expansion header on the rear. The Arduino code itself is modular, allowing various software "modules" to be strung together into virtual synths. (Re-programming is recommended for advanced developers only and requires some C++.)

Hardware designed by John Staskevich. Software by Gaetan Ro and myself. Front panel design by Hannes Pasqualini. Additional sound design by Sunshine Audio. Special thanks to Josh at Toppobrillo for his support.

Released: Early 2014.

Bret Truchan
Microbe Modular

Current requirements when using 5V from rack supply:
+12V: 17mA
-12V: 17mA
5V: 165mA

Current requirements when using +/-12V supply only, with regulator + heatsink added:
+12V: 191mA
-12V: 17mA


  • 17 mA +12V
  • 17 mA -12V
  • 165 mA 5V
  • 38 mm deep
  • Ø 4.56 (9 Votes) Average Rating

Available as an assembled Module and as a DIY project.

This Module is discontinued.

$230 Price in € submitted Sep 16th 2013, 21:25 by FSK1138 | last Change Jun 8th 2020, 14:16 by motorhead412

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