This module has 3 independent VCA elements. Two logarithmic-response AC-coupled VCAs with an initial gain control, and one linear-response VCA. The linear section is calibrated so that 5v on the control input is unity gain and 0v is null. On the logarithmic sections, 5v will achieve unity when the dial is around 3 o'clock, and distortion will be presented above that.

This module features a PCB designed by Detachment 3 Engineering.

http://stgsoundlabs.com/products/signal_amplifiers_mu.htm