The third revision of the Feedback EQ distortion module

Features:
4 band feedback EQ distortion.

2x audio / CV inputs
2x audio / CV outputs
EXT audio input, EXT audio outputs (SEND RETURN path)

4 potmeters for frequency volume
1 potmeter for feedback amount
1 potmeter for gain amount

Use this effect as a sound destructor, weird oscillator, CV mutator.
Route effects through the EXT path for more audio mangling and adding CV ‘sidechain’ control over the feedback path.

Demos:

https://soundcloud.com/martijn-verhallen/monotropa-track-edit
https://soundcloud.com/martijn-verhallen/dub-monotropa-edit
https://soundcloud.com/martijn-verhallen/noise-feedbackpath-compilation-edit
https://soundcloud.com/martijn-verhallen/monotropa-noise-distruction-edit

Monotropa with Ginko Seeds:
https://soundcloud.com/martijn-verhallen/monotropa-with-seeds

Sound recordings of the previous Monotropa version (with 3 EQ bands): 
https://soundcloud.com/martijn-verhallen/sets/monotropa-sounds-1

If you are interested: mail me!
martijn@reverselandfill.org

This project is open source.
You can use the schematic to make your own boards, but please:
-Mention my name “Reverselandfill” or “M.Verhallen”
-Only do non-commercial runs. Private use only.

Build files:

This is an open source project. CC-BY-SA

Here is someone (ASAGACO) who made it from the schematic without PCB!!

Here is a DIY stripboard layout by Eddy Bergman:
https://www.eddybergman.com/2023/03/Feedbackequalizer.html

Someone in Korea made a freeform version, super nice: