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Product Description

The VOLT is a precision voltage source and offset generator for eurorack modular synthesizers.  

With it’s 14V range (-7V to +7V), VOLT can be used to calibrate oscillators, filter tracking, or anything that needs a 1V/Oct calibration.

VOLT has two buttons.  Push the top to increase the voltage by one volt.  Push the bottom button to decrease the voltage by one volt.  Push both buttons at once to reset the voltage back to a known value.

VOLT has 3 voltage inputs and 3 voltage outputs.  The input signal is summed with the voltage source, generating offsets of 1V or 1 octave at a time.  This means it can be used as a precision octave switch for oscillators that lack the functionality.  Create variation in your sequences with a quick touch of a button.

VOLT’s octave buttons can also be switched via external gates, essentially making it an octave sequencer. One input causes it to go up, and the other causes it to go down.  Two gates at once will reset the voltage back to your set value.  Running basslines and melodies through volt to be sequenced up and down by octaves is a very effective and a fun way to work.


  • VOLT is extremely precise. An offset error of +-1mV and a gain error of 0.033% make VOLT the perfect tool for calibration.
  • 14V range
  • 3 in / 3 out precision adding
  • Gate inputs for sequence octaves with external CV
  • User set-able reset point for more control



Size: 4hp

Depth: 30mm (with cables)

Power: 34mA, -17mA

Trigger Inputs: 100k ohm impedance

CV Inputs: 100k ohm impedance Sums with out.

Output: 220 ohm impedance 22Vpp range, -7V to +7V offset Offset error +-1mV Gain error 0.033

Product Videos

WMD VOLT - Precision Voltage Source and Offset Generator (01:29)
The WMD VOLT was originally designed as a testing and calibration tool for our quality control team as 1V/ Oct calibration requires a precision voltage source to ensure intonation across many octaves. Need to calibrate an analog synth's oscillator, filter tracking, or anything else that requires a healthy 1V/octave signal? Try VOLT! VOLT features a 14V range, dedicated buttons as well as gate inputs for up and down control. Use the gate inputs to turn VOLT into a simple octave sequencer. Add in front of your oscillator in the pitch CV path to add an octave switch to any oscillator. Run up to 3 CVs through VOLT and offset the CV 1V at a time. All three ins and outs are controlled by the same offset. Volt is a 4hp eurorack module for use with modular synthesizers, hardware synths, and more. VOLT requires a eurorack case and power supply. For more information on VOLT, visit:https://www.wmdevices.com/products/volt-1 00:09 - CV offset control 00:14 - CV reset 00:21 - Program reference voltage 00:34 - Applications 00:45 - Dedicated gate inputs 00:58 - Sequencing variations follow us on Instagram, Facebook, and Twitter: @WMDevices. For more information on WMD, visit: WMDevices.com
  • WMD VOLT - Precision Voltage Source and Offset Generator
    The WMD VOLT was originally designed as a testing and calibrat...

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