Frap Tools 411 is DC-coupled, linear Quad-VCA. A mega-useful utility for modulating modulations.
Noise Engineering Ampla Versio is an ADSR-controlled VCA, with a resonant multimode filter and additional stereo chorus.
ARDABIL utility module allows you to get more out of your modular system + switch
Serge-style slope generator and four-quadrant VCA
This product has multiple variants. The options may be chosen on the product pageDelta-V features two function generators with additional VCAs. The components are matched very well. Their sound is clean and free of clipping.
The Dual EnvVCA doubles the power of the EnvVCA delivering two channels of its VCA and envelope combination.
The Voltage Controlled Amplifier or “VCA” is one of the most essential and useful building blocks in a synthesis patch.

