Inspired by Twin T-Networks circuits used in many lengendary drum machines we developed a simple and straight forward 4 voice percussion module with frequency controls for each of its voices.
At each voice input there’s a gate to trigger converter so any input source is possible.
Audio inputs can also be used as an input, in this case and due to the nature of the gate to trigger converter, each voice can be used as very destructive filters.
4 Voices each with:
Frequency Range Switch, Low/Mod/High
Summing Mix output with Volume control
2.5 cm deep
This module is also available as a DIY Kit from Thonk:
Here's the detailed step by step Assembly Guide Pdf: