Never mind the design of the filter....i don't care about it..
Diva lacks a filter with a huge amount of self-oscillation starting immediately after the middle of the Cutoff (as Bazille (but more ear-splitting) - Prophet 08-VS-5)......WITHOUT loss of gain.
It's not easy to make some kind of P08/A6 sounds in DIVA.
I've read that Urs is working on 303/Stainer Parker/Polivoks designs...but i had to say my piece!
Thank you for the attention!