The " mixed " Oberheim synth to me actually refers to an OB-Mx , I guess? :roll:
Anyway, I don't love Matrix series very much , I played the 12 and it has a crazy interface with six stepped knobs and it didn't sound like I expected ( to me a thinner sound than on the OB series ).Same crazy interface had the OB-Mx, even crazier!
What I think is the core of Oberheim sound lies in the old 12dB/Oct SEM filter which was also onboard OBX .
Anyway I hope that,for the moment, Arturia will improve the already existent synths to achieve perfection!