Two channel - Precision CV Mixer/Adder
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What is it? 3to1 is a precision DC-coupled mixer/adder module, with three inputs and one output. The output voltage being the exact addition (or subtraction) of the three input voltages. This module…
Read More…3to1 is a precision DC-coupled mixer/adder module, with three inputs and one output. The output voltage being the exact addition (or subtraction) of the three input voltages.
This module is particularly useful when you want to combine (add or subtract) accurately several Control Voltages together. The two channels are independent and alternatively, it can be used as a simple, plain, audio mixer.
The accuracy of a Control Voltage is extremely important. In modular synthesizers, one volt represents an whole octave. And one semitone is only separated from another semitone by only 1/12th of Volt, or 83.3mV. It’s easy then to get out of tune just by having some extra milivolts added (or subtracted) due to some component’s tolerance drift.
So, for example, when you want to combine two CVs from different sources (for example: a keyboard and a sequencer), you want to get exactly 1V + 1V = 2V. Not 2.01V, not 1.99V.
But as we live in a real world, components are not ideal and their wide tolerances sometime add a lot of errors.
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