The Bastl Instruments Dark Matter (Black) is a Voltage Controlled Audio Feedback Module for Eurorack Synthesizers. It is able to add heavy Distortion and atonal Feedback Sounds to the incoming Audio Signal. The Input Stage has extra Gain and the Output is driven to fry the remaining part of the Signal. The 2-Band Equalizer is composed of Bass and Treble and is Voltage Controllable. The Feedback Circuit produces subtle to extreme Feedback in the positive and negative range, which can colour the Signal, not to say Distort it. Thanks to the built-in Envelope Follower, Modulations can be produced without the need for additional Modules. CV Inputs are available for many Parameters and even the Feedback Loop is freely accessible, so it is possible to integrate a Delay and/or an Equalizer Module.