Thanks a lot for you effort! I read a bit into the modules you proposed and I think I can understand most of the principles. One question though: Is it necessary to use a VCA pre VCF? The VCA converts the voltages of the VCOs to an audio signal; right? Doesn't the filter also work with raw voltage signals?
For the modules: The Steiner-Parker filter fits nicely into the setup, I think. Actually when I did the first setup I wanted a more “normal” filter than the Belgrad, but couldn't find any on the first try. The Klavis Twin Waves also look super interesting. I can use them ARP like with the shifty, but I also could use them together as a true polyphonic voice and detune them in regards to each other, right?
I also saw the Zadar EG. Would you recommend it in this setup for ADSR? With the Zadar there also would be additional LFO sources. With the Twin Waves also having a LFO functions perhaps the Batumi + Poti as well as the 4x Doepfer ADSR can be replaced? The Doepfer ADSR seem more classic and straight forward (which I like a lot) but with the Zadar perhaps not necessary.