Compact. Clear. Capable.
The Shakmat SumDif is a versatile 2HP dual adder and differentiator designed for both CV and audio tasks. Whether you’re mixing voltages, inverting signals, or venturing into Mid/Side audio processing, SumDif delivers sharp accuracy with a minimal footprint.

Each channel handles A+B and A–B operations, allowing use as a unity mixer, buffered multiple, or inverter. With precision signal handling and support for V/oct signals, it’s a trusted tool for modulation and pitch duties alike. Rear jumpers allow optional -6dB attenuation for refined output control.

Features

• Dual adder/differentiator for CV and audio signals

• Simultaneous A+B (sum) and A–B (difference) outputs

• Functions as a unity mixer, signal inverter, or buffered multiple

• Mid/Side audio processing ready

• -6dB output attenuation via rear jumpers

• Skiff-friendly design (29mm deep)

• V/oct accurate signal handling

Technical Specifications

• Width: 2HP

• Depth: 29mm

• Power consumption: +12V: 15mA, -12V: 15mA

Applications

• CV signal routing and conditioning

• Mid/Side processing in audio chains

• Pitch signal mixing and inversion
  Small module, maximum impact.