Module is available as a DIY project only.
No info about availability.
Simple but effective VCA
The Voltage Controlled Amplifier (VCA) is an essential part of any analog synthesizer's architecture. Thomas Henry has designed a low parts count, yet very effective VCA for your modular synth.
http://www.birthofasynth.com/Thomas_Henry/Pages/VCA-1.html#VCA-1/Thomas_Henry_Resources
