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Elby Designs
ES18 VC-Multiplier 3 - 7HP

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Item: N13-5174

ES18 VC-Multiplier 3 - 7HP


The rectifier section from the VCM implements non-linear wavehaping known as full-wave rectification, but with complex level-compensating conditioning as well. The circuit actually uses three full-wave rectifier sections connected in a very refined controllable format.

Each section is capable of doubling the frequency of a sine or triangle wave applied to its input. Thus sweeping the voltage controlled input over its range will generate a smooth timbrel transition with the even harmonics (second, fourth, and eighth). Various other partials are present in this basic sound, however, and the results are very rich and varied.

A noteworthy feature of this multiplier is that the full-wave rectification is not followed by a reduction in the output amplitude. There is no change in the essential level of the sound.

There are two inputs for mixing before processing, and two outputs. One output is a "squared up" version of the other. This output is similar to voltage controlled pulse width modulation (only much more interesting).


  • Uses full wave rectification
  • Complex level compensating conditioning for no loss in output
  • Two inputs for mixing prior to processing 

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  • Module Width: 7HP
  • Power +12V: 20mA
  • Power -12V: 0mA

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