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The ES01 is based on the 1973 RANDOM SOURCE module which itself was literally a combination of the NOISE SOURCE and the SMOOTH & STEPPED GENERATOR boards internally linked to form the RANDOM SOURCE. The ES01, however, is a brand new re-design of the original RANDOM SOURCE.


The ES01 produces random voltages which vary smoothly or in a step-wise manner.

Random timing pulses are also available from the [TIMING] output.


The rate of change of all outputs is voltage controllable over a wide range.




This Module is available to buy as - 


  • A fully assembled module with 3.5mm sockets. (Eurorack 1/8" Standard)
  • A fully assembled module with 4mm sockets. (Banana Jack)
  • A full DIY kit, all parts and components to build your own 3.5mm sockets.
  • A full DIY kit, all parts and components to build your own 4mm sockets




Width: 10hp

Depth: 60mm

Contents: Module, Ribbon Cable, Screws

Build and Technical Information: Click Here

Elby Designs Serge ES01 Random Voltage Generator Eurorack Synthesizer Module

3.5mm or 4mm Jack
  • Shipping Transit.

    With Tracking 7-14 Business Days (Estimated)

  • Sales & Taxes.

    The sale price listed is AUD (Australian Dollar), and is the final price to pay.

  • Payment.

    Credit Card (Visa, Mastercard, Amex), PayPal.

  • Warranty/Returns.

    1-Year warranty against defects, and manufacturing faults. (Click for more)

  • Additional Notes.

    This module is available to buy with 3.5mm (1/8" Jack) sockets or 4mm (Banana Jack) sockets.