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Note: This item may not be returnable or could require a restocking fee. Contact one of our Audio Consultants for more details. Due to the special nature of this item, we order each unit fresh from the factory, exclusively for you! Lead times may vary so please chat, call or email for up-to-date inventory status.



WMD OSD (OR / SUM / DIF) Utility Eurorack Module

Eurorack module featuring 3 independent blocks of useful utility in 4HP


Product Description

WMD OSD, aka OR SUM DIF, is 3 independent blocks of useful utility in 4HP. OSD is centered around combining voltage in useful ways. Audio, V/Oct, and control voltage are at home in this utility. OSD offers a fully DC-coupled signal path with precision components to make this happen. High quality, configurability, and compact size ensure OSD will always find its way into your patch.

  • Combine v/Oct sequences with precision summing, or enable the precision OR circuit for completely different results
  • Mix two envelopes or an envelope and LFO using sum to create large accented voltages or combine with OR to keep the output in the original range
  • Crossfade between audio or control voltage using the potentiometer in block one, setting DIF will invert the signal at the B jack

What is OR, SUM, and DIF?

  • OR - Input voltages are compared and the higher of the two is passed to the output (if A = 4V and B = 8V, the output will be 8V)
  • SUM - Input voltages are added together to create the output voltage (if A= 3V and B=4V, the output will be 7V, this clips at -10V and 10V)
  • DIF - Lower voltage source is subtracted from the higher voltage, producing an output of the difference between the two (if A= 3V and B = 5V, the output will be 2V)


  • Block 1 - Sum, OR, or Difference of two inputs and effect the mix of the A input to the B input with the Knob, the third input ORs with the result of the A/B inputs
  • Block 2 - Sum, OR, or Difference two inputs with a fixed mix of 50%, the third input ORs with the result of the A/B inputs
  • Block 3 - 3 input OR, mix gates or CV from three sources for some wild results

Product Specifications

Condition New
Depth 40mm (with cables)
Chassis Module
Module Type Eurorack
Module Slot Count 3hp
Connector Type 3.5 mm
Power Consumption 50 mA +12V; 50 mA -12V

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