eurorack version by Timo Rozendal of Yusynth's take on the Steiner Parker filter with a few modifications

This is the famous Steiner Parker filter (a variant is implemented in the Arturia Microbrute with separate buffered inputs for Lowpass, Highpass and Bandpass. The Lowpass input is normalled to the other 2 modes, so you can go smoothly from low to highpass by turning the knobs.

This version is made and sold with permission by Yves Usson

more info: https://www.muffwiggler.com/forum/viewtopic.php?t=149151&postdays=0&postorder=asc&start=0