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Oberheim DMX MIDI Upgrade

A MIDI upgrade for all non-MIDI Oberheim DMX drum machines is now available from Electrongate!

This upgrade adds MIDI input and output capability and expanded memory capacity to your DMX. When installed, your DMX will send and receive MIDI note-on/note-off messages, system exclusive sequence dump messages and MIDI clock, song select, start and stop messages. MIDI input and output jacks are added to the right side panel of the DMX and a circuit board is installed inside. (The MIDI upgrade replaces the memory expansion board on machines having that option installed.)

This interface is functionally equivalent to the Oberheim factory MIDI upgrade, which is no longer available.

See this pdf file for a detailed list of MIDI related edit parameters provided by this upgrade.

New! The currently shipping version of the Electrongate MIDI upgrade now includes an on-board lithium battery which replaces the old, leak-prone NiCd battery. The lithium battery is the same as those used on the Oberheim DX, and is reliable and has a very long lifetime, in excess of ten years. (Many DX units using this type of battery are still working with the original battery, even after 30 years or more).

The new MIDI upgrade design also includes a MIDI Thru connector on the board, so you can choose MIDI Out, or MIDI Thru as well as MIDI In. If there enough demand, a three-jack mounting plate may be added as an option in the future.

Available installed by Electrongate or install it yourself for $129 to $179.

Photo of DMX MIDI circuit board
    Upgrade options:
  1. Full upgrade: Send your DMX to Electrongate in Coalinga, California and have the MIDI upgrade professionally installed and tested for $199.
  2. Do-it-yourself: Assembled circuit board with pair of real walnut end panels, one panel with MIDI jacks installed: $179.
  3. Do-it-yourself: Assembled circuit board with unmounted MIDI jack plate: $129. You will need to make a cutout in the right side panel for the MIDI jacks. You may also send your right side end panel with your order, and we will modify it for the MIDI jacks at no extra charge).
Do-it-yourself requirements
To install the DMX upgrade yourself, you will need the following tools:
  • #2 Phillips screwdriver
  • 1/4 inch nutdriver
  • Small flat-blade screwdriver, or IC chip puller tool
  • Soldering iron and rosin core solder
  • Xacto® or other sharp knife
You will need to cut one circuit board trace and solder two wires to the DMX main board. The rest of the installation is very straightforward and mainly involves removing socketed ICs and plugging in ribbon cables.

Illustrated installation instructions can be found here.

Ordering Information
All orders must be prepaid by check, money order or PayPal. You may use the PayPal shopping cart (below), or you may make your payment in care of pjwhite@electrongate.com. Include your shipping address, specify that payment is for the "DMX MIDI Upgrade", and let us know which upgrade option you would like.

Please contact Paul White to arrange shipment of your DMX for repairs or upgrades. When sending your DMX for installation of the MIDI upgrade, be sure to pack it securely in a strong cardboard box with at least two inches of packing material all around.

Important! Please contact Electrongate before shipping your DMX for repair or upgrade. We don't want to miss your unexpected shipment by being out of town when it arrives. If possible, please email a shipper tracking number so we can know when to expect your package to arrive.

Contact information:
187 E. Polk St
Suite 25
Coalinga, CA    93210

Contact Paul J. White for more information.

PayPal Shopping Cart

DMX MIDI Basic DIY Kit ($129)
DMX MIDI Kit with matched pair of end panels ($179)
DMX MIDI Kit with single modified end panel ($154)
DMX MIDI Full Upgrade Installed ($199.00) Includes MIDI upgrade and standard overhaul (switch cleaning and minor repairs as needed).
Contact Electrongate to arrange shipping and payment

Copyright 2008-2021 Electrongate -- Comments & questions to Paul J. White