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Wednesday, March 01, 2017

New Befaco A*B+C Eurorack Module

A*B+C Features Published on Mar 1, 2017 Befacosynth

"This video outlines the features of our A*B+C module. The A*B+C is a dual channel 4-quandrant multiplier with DC offset. It has many uses including VCA, 4-channel mixer and for creating true Ring Modulation.

0:09 - Introduction
0:29 - VCA
1:12 - 4 Channel Mixer
1:41 - Ring Modulation

The A*B+C is available as a kit, PCB & Panel set, or as an assembled module from our store www.befaco.com/en/tienda/"


Each section can perform the analog multiplication of two signals (A and B) and add an offset (C). It can also act as a dual voltage controlled attenuverter, dual ring modulator, dual VCA or four channel mixer (see block diagram below).

The B inputs are routed to an attenuverter that multiplies the signal between -2 to 2, while the offset inputs (C) route through a unity gain attenuverter (multiplies the signal between -1 and 1).

B and C inputs are normalised to 5v and 10v respectively, so the A inputs can be processed using just the potentiometers.

The output of first block is normalized to the second one, so the second output can act as master to get (A1*B1+C1) + (A2*B2+C2)."

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