A versatile foldback distortion module for my DIY modular synthesiser.
This module distorts the shape of an incoming signal, by “folding back” the peaks that go over/under a threshold voltage back the other direction.
The threshold voltage can be set with a panel control, and additionally supplied as a control voltage, for even more interesting effects.
Depth of foldback, as well as symmetry can be set. It’s a fun creativity tool to apply on both audio and modulation signals.
- Circuit design and simulation; conceptually mainly using Falstad CircuitJS and further using LTSpice.
- Schematic capture (KiCad)
- PCB design, split into two stacked boards (KiCad)
- Panel design (Inkscape)
- PCB Assembly, panel assembly
All design files, including some variations of the Falstad simulation, can be found on GitHub: Distortion module