A VCF I've been working on... a state-variable filter based on the J. Haible/R. Schmitz discrete 2040 gain cell. The original filter core was designed by Scott Stites and has been enthusiastically developed by myself.

VCOs used in 2-oscillator patches are TipTop Audio Z3000, in 3-oscillator patches I add a Synthasystem re-issue. VCA, when in use, is integrated. 

Apologies for the hi-hat bleed/poor recording in some of the patches, this passed through an ad-hoc signal chain as my recording interface is currently out for repair. I'll be replacing the file with a better one as soon as I can record one.  (Ok, I added on to the end rather than replace, but my interface is back!)

Discrete SVF Test 01

negativspace