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The ED129 is specifically designed for CV expansion but will work equally well with audio signals.


It is often necessary to patch a CV output to multiple modules. When this is being done with a 'crucial control voltage' such as 'pitch' e.g. using a CV to tune 2 or more VCOs, it is important that each 'INPUT' gets exactly the same voltage. To prevent potential voltage differences due to variations in impedance of patch leads and patch points, it is preferablle to use a buffered output that positively drives each input independently.


The ED129 has two sets of buffered outputs configured to nominally provide a 1-in/2-out buffered expander and a 1-in/3-out buffered expander. If the 2nd, lower, [IN] jack is not used then the first section becomes a 1-in/5-out buffered expander.


Although normally supplied with either 3.5mm or 4mm jacks, the ED129 can also be supplied with a mix i.e. [IN] jacks in one format, [OUT] jacks in the other to allow mixed format systems to be easily patched.


The ED129-Precision uses 0.1% matched resistors to achieve a close tracking (typically +/-0.2%) when driving multiple VCO's and should be better than 6 cents over a 5 octave range. The ED129-Standard uses 1% matched resistors achieving an accuracy of, typically, +/-2%. The standard model can be used in less critical applications such as driving 1V/Octave inputs on VCFs or other modules requiring a multipled CV signal.


*Please note* The Standard version has a tracking accuracy, typically, of +/-2% while The Precision version has a tracking accuracy, typically, of +/-0.2%




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: 4hp

Depth: 53mm

Contents: Module, Ribbon Cable, Panels, Screws

Build and Technical Information: Click Here

Elby Designs ED129 Multiples Standard Buffered Mult Eurorack Synthesizer Module

SKU: ED129s
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.