This is the third and final video / new product from AJH Synth at Synthfest UK 2017 in Sheffield. The Gemini 2412 is a dual state variable filter based on the classic SEM filter. There’s a lot of tricks not often seen include series cascaded and parallel use of the filters, filter CV mixing that scales to each filter, a dual frequency control, totally independent dual filter use (should you wise) and a CV-able mix between the two. There’s also CV-able resonance which is rare on SEM style filters.

Other AJH Synth products from Synthfest
Mega-Phase 12 – https://www.youtube.com/watch?v=k1LtcSRXtl4
Finale R-EQ – https://www.youtube.com/watch?v=Xa4m3wn4tm8