Happy Nerding 3xVCA

Name: 3xVCA
Brand: Happy Nerding

AC/DC-compatible VCAs for control voltages and audio.

6 HP Eurorack module

A three-channel linear VCA for audio and control voltages. Each channel has level and bipolar CV attenuation controls, while cascade switches combine adjacent channels into mixed outputs.

Features

Handles both control voltages and audio, with AC/DC compatibility, a very low noise floor, and effectively no distortion.
Each VCA has a signal input, CV input, and output.
Dual potentiometers control each amplifier's level and bipolar CV attenuation.
Cascade switches provide 1+2, 2+3, and 1+2+3 output mixes.
Two-color LEDs show CV and output signals.
Reverse-power protected.

Controls & Jacks (20)

Channel 2 CV Input— Control-voltage input for the second VCA.
Channel 1 Level and CV Attenuverter— Concentric dual potentiometer controlling channel 1 level and bipolar attenuation or inversion of its CV input.
Channel 1 Output— Outputs the result of channel 1, which can also be fed into channel 2 by the associated mix switch.
Channel 1 Output Indicator— Two-color indicator visualizing channel 1's output signal.
Channel 2 Output— Outputs channel 2 or the channel 1+2 mix and can feed that result into channel 3.
Channel 1 CV Input— Control-voltage input for the first VCA.
Channel 3 CV Indicator— Two-color indicator visualizing channel 3's CV signal.
Channel 3 Output— Outputs channel 3, the channel 2+3 mix, or the combined channel 1+2+3 mix according to the mix-switch settings.
Channel 3 Level and CV Attenuverter— Concentric dual potentiometer controlling channel 3 level and bipolar attenuation or inversion of its CV input.
Channel 1 Signal Input— AC/DC-compatible signal input for the first VCA.
Channel 2 Level and CV Attenuverter— Concentric dual potentiometer controlling channel 2 level and bipolar attenuation or inversion of its CV input.
Channel 2 Signal Input— AC/DC-compatible signal input for the second VCA.
Channel 3 Signal Input— AC/DC-compatible signal input for the third VCA.
Channel 2 CV Indicator— Two-color indicator visualizing channel 2's CV signal.
Channel 1 CV Indicator— Two-color indicator visualizing channel 1's CV signal.
Channel 3 CV Input— Control-voltage input for the third VCA.
Channel 2 Output Indicator— Two-color indicator visualizing channel 2's output signal.
Channel 3 Output Indicator— Two-color indicator visualizing channel 3's output signal.
Channel 1-to-2 Mix— Feeds the result of channel 1 into channel 2's output path to produce a channel 1+2 mix.
Channel 2-to-3 Mix— Feeds the result of channel 2 into channel 3's output path, enabling channel 2+3 or channel 1+2+3 mixing.

Explore the interactive 3xVCA panel on BleepDex — tap any control to learn what it does.