Bastl Instruments Dark Matter – Creative Voltage Controlled Feedback Distortion Eurorack Module Is Out Now!

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Dark Matter can create lovely distortion, pure destruction and more!

At the Superbooth 2018, Bastl Instruments introduced the first Eurorack module in collaboration with Casper Electronics. The Dark Matter is a creative and performance oriented voltage controlled feedback/distortion module for Eurorack. I can not only completely shred your audio signals but also add a nice distorted touch to your sounds. It can even make sounds fuller and richer.

Especially if you love industrial sounds or even the lovely distorted sounds of Peter Edwards of Casper Electronics, the module is a perfect match.

Bastl Instruments Dark Matter


Bast Instruments and Casper Electronics are proud to present the newest member of our modular family. Meet Dark Matter, a high energy sound processor and signal generator that unleashes the crazy raw power of audio feedback into your eurorack system.  It’s inspired by “no input” mixer feedback techniques that explore the complex natural behaviors of amplifier circuits pushed beyond their limits.

Dark Matter brings this behavior to the modular synth, adds voltage control to everything, tons of patching options and a big ol’ bag of tricks for making feedback a truly *playable* effect.

Things To Do With Dark Matter

  • Excite audio signals to the breaking point with 4 flavours of voltage controlled overdrive.
  • Turbo charge percussive hits and drum beats.
  • Add sub-octave tones and timbrel richness to melodies and bass lines.
  • Tweak your tone with a crunchy overdriving 2 band EQ.
  • Add signal ducking and gating effects with the built in envelope follower.
  • Go the feedback way and create meandering loops through your rack using the 10 I/O jacks…..Feedback your feedback your feedback.


  • Input VCA with gain and soft clipping
  • 2 band equaliser with voltage controlled bass and treble boost/overdrive
  • Voltage controlled feedback
  • External feedback section for making and fine tuning loops through other modules
  • Voltage controlled crossfade between input and feedback signals
  • Input tracking envelope follower for adding ducking and gating effects
  • 10 I/O jacks for adding CV and making crazy loops

Technical Details

  • 13 HP
  • PTC fuse and diode protected 10-pin power connector
  • 24 mm deep
  • power consumption +12V: < 75mA; -12V: <75 mA

Bastl Instruments Dark Matter by Casper Electronics is available now at and select dealers for 265€ excl. tax.

More information here: Bastl Instruments

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