This Module is currently available.
Four Knob Controller
Virtue Control modules from Kilpatrick Audio are the first Eurorack modules from Kilpatrick Audio designed specifically as USB MIDI controllers! Take control of virtual modular synthesizer software like VCV Rack as well as your DAW with a custom control setup that you can design yourself. Using the Hubbie USB hub module allows you to keep wiring neat inside your enclosure and connect up to four controllers to your PC or Mac with a single USB cable. Design the controller of your dreams with Virtue Control modules from Kilpatrick Audio!
The simplest of all Virtue modules Twister offers four high-quality metal potentiometers. Each one sends out a CC message, and a CC message can also be sent to the module to control a red LED next to each knob. Map the knobs to your monitor volume or other basic parameters in your module software, or set up a few in a row to make your own matrix mixer!
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These merchants probably sell this module. Huh?