TouellSkouarn’s idea of a fiter is, as expected, pretty weird as it is based on an inductor. According to this unique design the sound is extraordinary and somewhere in between a phaser-ish band pass, distortion and a gnarly wahwah with a vintage character.
Even if the module is pretty simple it has LOTS of character. We find an input and one output level control and also a big cutoff controller. The small grey knob controls resonance. A cutoff CV input with attenuator is there as well but that’s about CV control. Frequency behaviour is very dependent on the other parameters’ settings.
This boutique module is hand-wired.