Available as an assembled Module and as a DIY project.
This Module is currently available.
Analogue Multimode Filter
Carve it out!
Carve is an analogue multimode filter based on the well known MS-20 (René Schmitz) design. It features a blend control between the low pass and high pass output. With full resonance, this filter can also be used as an oscillator (tracking 1V/Oct across four octaves).
Sound Demo: