MiniMod CV Mix-Offset-VCA

A four channel polarising mixer with a voltage source and a DC coupled linear VCA. Every input is bipolar, added straight or inverted as its control turns either way from the centre: with nothing in IN 1, INPUT 1 becomes a +/-6 V source; INPUT 2 is a plain attenuverter; INPUT 3 has a gain of two; a switch turns channel 4 into an offset control and a second CV input for the VCA. Uses include mixing modulation sources, offsetting a CV and turning a bipolar modulation unipolar.