Elk Elektroniks are holding a workshop this sat.
The Neutral Labs Scrat Steiner-Parker filter.
This is a eurorack DIY kit.
" You can change the resonance flavour by plugging in components like diodes, capacitors or resistors (even LEDs and/or light-dependent resistors) directly to the front panel. A set of preset cartridges is also available, which gives you instant access to a variety of filter sounds. You could even make your own. Or go all in and connect some jumper wires to a breadboard for pretty much endless possibilities."
