I wonder how many interest there would be in a PCB for a Trapezoid VCA.
It would - of course - be designed to emulate the behaviour of the famous EMS Synthi A and VCS3 Trapezoid, and it would be - of course - not be a direct copy of the EMS circuit.
Usual pricing for my PCBs, no exotic components needed, rather easy to build, no component selection necessary.
Let me know.
JH.