Befaco A*B+C is a logic module for modules Synthesizer in Eurorack format. The A * B + C is a dual four quadrant multiplier with VC offset. Each section can perform analog multiplication of two signals (A and B) and add an offset (C). It can also act as a dual voltage controlled A / D converter, dual ring modulator, dual VCA or four channel Mixer modulator. The B inputs are routed to a continuous current meter that multiplies the signal between -2 and 2, while the offset inputs (C) pass through an amplifier with gain factor one (multiplies the signal between -1 and 1). In addition, the upper section is normalized to the lower section, whereby the lower section functions as the master.