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.
pdf file for a detailed list of MIDI related edit
parameters provided by this upgrade.
New! The currently shipping version of the Electrongate MIDI
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 for $170, or install it yourself for
$129 to $149.
- Full upgrade: Send your DMX to Electrongate in San Jose, California
and have the MIDI upgrade professionally installed
and tested for $170.
- Do-it-yourself: Assembled circuit board and modified walnut end panel
with MIDI jacks installed: $149.
- 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).
To install the DMX upgrade yourself, you will need the following tools:
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.
- #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
installation instructions can be found here.
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 firstname.lastname@example.org.
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.
33 S. Third Street #335
San Jose, CA 95113
Contact Paul J. White for more
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DMX MIDI DIY Kit without end panel ($129)
DMX MIDI Kit with end panel ($149)
DMX MIDI Full Upgrade Installed ($170.00)
Contact Electrongate to arrange shipping and payment