Another filter from haraldswerk. This time a 36db one that can also be used as a sine VCO when plugged in from the 12db output into the second input. I haven’t used it much I just finished calibrating the bad boy. Have to update this post when I have played a bit more with it.
https://www.haraldswerk.de/Filter/36dB_Euro/VCF_36dB_Euro.html
Difficulty to build: Hard