Available as an assembled Module and as a DIY project.
This Module is currently available.
Dual LM13700 linear VCA
York Modular:
This is a dual VCA, each channel of which uses one of the transconductance amplifiers on the 13700. It works best with signals in the +/-5V range, although it's relatively unbothered by particularly hot CVs from envelope generators.
INCLUDING THE POWER CABLE, THIS MODULE HAS A DEPTH OF APPROXIMATELY 50mm - PLEASE ENSURE THAT YOUR CASE IS DEEP ENOUGH TO ACCOMODATE IT.
https://www.yorkmodular.co.uk/products/otavca-dual-lm13700-linear-vca-4hp
