Dual Processor

This module is a refined, modern adaptation of the classic 1973 Serge Dual Processor (PRC), originally designed by Serge Tcherepnin. As outlined in the original SMMS catalog:

“The Dual Processor (PRC) consists of two independent circuits for adding and inverting control voltages. It provides full control over the level and polarity of three input voltages, along with a manually adjustable offset that can be added to the mix.”

In this updated version, a compression/saturation circuit has been added, introducing rich, nonlinear behavior that enables signal shaping—from subtle soft-clipping to aggressive wave distortion.
This enhancement expands the module’s capabilities for both control voltage (CV) manipulation and audio signal processing.
The entire circuit is DC-coupled, ensuring compatibility with a wide range of modular applications.

DIY Build Documenation:
LGE012 V1
LGE012 Bill of Materials
LGE012 PCB Layout w/ Designators
LGE012 Schematic
LGE012 Main Board Mouser Cart

(Mouser Carts do not have potentiometers, stand -offs, 0.100”board to board headers, knobs,and some specialty parts that can be found at places like Synthcube, Thonk, Modular Addict, etc)

Mechanical Parts BOM generally required for building Low-Gain Electronics Modules

** 4U Modular is a term used for the format most commonly known as “Serge Format” or “Loudest Warning Format”. Out of respect for the ever growing format, 4U Modular is the easiest way to refer to it. More Specifically it refers to the panel height and mounting hole style. 4U Modular will patch up just fine with other 4U "Serge" formats such as "Random Source", but it will not mount in RS boats or Buchla Boats (or power off Buchla power for that matter). An info page about this will be added to the website soon to make this a lot more easy to understand.

Details:

• PCB Size: 6” x 2”

• Current Draw: TBD