AI Synthesis has released the AI007 Quad VCA/Mixer for Eurorack modular synthesizers, in both pre-built and DIY formats.

The AI007 Quad VCA Mixer is designed to be a compact way to control voltage (audio or cv) in your modular system. Each of the four inputs are DC coupled, allowing the amplitude of CV signals, as well, as audio rate signals to be voltage controlled.

The outputs are also normalled together into a mixer, allowing the AI007 Eurorack Quad VCA Mixer to be used as a voltage controlled mixer. Once a cable is patched into a VCA output that output is removed from the mixer signal, allowing each channel to be used independently, giving users four VCAs in total.

A dedicated knob shapes the curve response from Linear to Exponential.

Step-by-step build instructions, schematics, and circuit explanations are available at the AI site, along with other info on synth DIY and getting started with modular synths.

Pricing and Availability

The AI007 Quad VCA/Mixer is available now, starting at $15 for barebones PCBs and $189 pre-built.