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The Synhouse Original MIDIJACK is an analog multimedia interface that can be installed in most analog monosynths providing a MIDI input to control these popular pre-MIDI analog synthesizers from todays' personal computer sequencers, MIDI keyboards, or other MIDI controllers.

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The Original MIDIJACK is designed to be compatible with the following analog monosynths:

Aries Modular Synthesizers*
ARP 2500*
ARP 2600
ARP Avatar
ARP Axxe
ARP Little Brother*
ARP Odyssey
ARP Solus*
Crumar Spirit**
Doepfer Modular Synthesizers*
EML ElectroComp synthesizers*
E-MU Modular Synthesizers*
EMS Synthi A**
EMS Synthi AKS**
EMS Synthi 100*
EMS VCS-3 Putney**
Exclusively Analogue Aviator*
Formanta Polyvoks**
KB Modular Synthesizers*
KB Wavemaker 4 Integrated Synthesizer*
Kawai 110F
Korg Mono/Poly
Korg MS-10 (may also use MIDIJACK II)
Korg MS-20 (may also use MIDIJACK II)
Korg MS-50 (may also use MIDIJACK II)*
Lord Skywave*
Moog Micromoog
Moog Minimoog
Moog Minitmoog*
Moog Modular Synthesizers*
Moog Multimoog**
Moog Prodigy Warning About Moog Prodigy
Moog Realistic Concertmate MG-1
Moog Rogue
Moog Satellite*
Moog Sonic 5*
Moog Sonic 6*
Moog Source
Moog Taurus II Bass Pedals**
Music From Outer Space Mini-Synth
Oberheim SEM
Oberheim OB-1*
Octave Cat**
Octave Kitten**
Orgon Enigiser*
Paia 9700 Series*
Paia EKx Series*
Paia Proteus I*
Polyfusion Modular Synthesizers*
Roland Promars MRS-2*
Roland SH-1
Roland SH-2
Roland SH-3*
Roland SH-3A*
Roland SH-5*
Roland SH-7**
Roland SH-09
Roland SH-101
Roland SH-1000
Roland SH-2000*
Roland MC-202
Roland System-100 Model-102 Modular
Roland System-100M Modular
Roland System 700 Modular*
RSF Kobol*
RSF Kobol Expander*
RSF Modular Model 11*
Sequential Circuits Pro-One
Serge Modular Synthesizers*
SMS Voice 400*
Steiner-Parker Microcon*
Steiner-Parker Minicon*
Steiner-Parker Synthacon*
Steiner-Parker SynthaSystem*
Synton Modular Synthesizers*
Synton Syrinx
360 Systems Spectre*
Technosaurus Microcon*
Technosaurus Selector*
Teisco 60F*
Teisco 110F**
Vermona Synthesizer*
and many more!

* The Original MIDIJACK is designed to be compatible with these machines but Synhouse has not yet had the opportunity to do a test installation on them. It may have been tested by someone in the field unknown to Synhouse.

** Has been installed in the field by at least a few customers without any reports of incompatibility, but this installation has not been done by Synhouse.

A complete list of the 12 functions of the Original MIDIJACK:
The complete list of functions above is referred to as the complete list of functions because it is the complete list of functions.
This means that there are are no secret functions and if it is not in the list, it does not have that function.

The Original MIDIJACK is for MIDI input only.

Original MIDIJACK advantages:

The right features and latest technology

All user selections of MIDI channel, MIDI Off, MIDI On, single note triggering, multiple note triggering, and MIDI transpose are stored in nonvolatile flash memory, so your preferences will be remembered even with the power off! The Synhouse MIDIJACK requires no batteries for this. Incorporating the latest advances in MCM (Multi-Chip Module) and VLSI (Very Large Scale Integration) technology, the MIDIJACK is the world's smallest MIDI device. The MIDIJACK utilizes a RISC processor and proprietary data processing architecture to make it the world's fastest MIDI processor.

How does it work?
Where Can I Buy It?
Since the introduction of MIDI, users have suffered from slow response time and "MIDI lag". For this reason, Synhouse has developed Accelerated MIDI for use in professional music applications. Accelerated MIDI utilizes a combination of digital sampling techniques and computerized numerical data filtering processes to separate critical MIDI data from unusable redundant MIDI data, process it, and implement it instantaneously. This creates a new type of MIDI processor that is dedicated to the specific applications of the Analog User, without ever allowing the CPU (Central Processing Unit) to be interrupted by useless data such as MIDI clocks and commands sent to other MIDI slave instruments on other MIDI channels. With the MIDIJACK, the analog note sounds while the slow-moving MIDI message is still in the MIDI cable! This allows the analog synthesizer to instantly respond to the players note action, preserving the finest rhythmic nuances. No other brand of products has ever achieved this level of timing accuracy.

Universal and flexible

The Synhouse Original MIDIJACK is a universal MIDI interface that can be added to most any common analog monosynth made by ARP, Moog, Oberheim, Roland, or Sequential. It also works on many more less common analog synthesizers such as modular systems by Aries, E-mu, Moog, Serge, and rare monosynths such as the Crumar Spirit, Octave Cat and Kitten, and RSF Kobol. The Original MIDIJACK even works where others don't, such as in the EML Electrocomp 101, EMS Synthi and VCS-3 Putney, and in the improperly calibrated Moog Micromoog. The MIDIJACK is fully adjustable so that any analog synthesizer with exponential VCOs can be controlled, whether it is 1 volt per octave, .9 volt per octave, .32 volt per octave, or 1.2 volts per octave. Most analog monosynths were originally built with only 2 or 3 octave analog keyboards with awkward triggering and note priority and the keyboard contacts have worn over time making them unreliable and difficult to play. The MIDIJACK provides selectable envelope triggering styles, latest note priority, and expands synthesizers to a 128-note range, greater than 10 octaves accessible through MIDI!

Built to last

The MIDIJACK is precision made from the finest materials, well exceeding the quality of the synthesizers it supports. With tough componentry such as a chrome steel DIN jack, thick FR4 fiberglass epoxy circuit board, machined aluminum iridite mounting brackets, black oxide steel hardware, and a button switch rated to withstand over 500,000 presses, the correctly installed MIDIJACK will go the distance.

Quick installation

Unlike MIDI retrofits made previously by other companies, the MIDIJACK is not a kit requiring assembly and does not take five hours of expert labor to install. The MIDIJACK is a fully assembled and tested microelectronic board that has a factory-made wiring harness with eight prepared, easy color-coded wire leads for simple user installation. It can be installed by anyone who can solder it to the right points. For convenience, Synhouse Factory Installation is available at Synhouse L.A. for most synths at the current pricing listed on the Factory Installation page. The MIDIJACK may also be installed by any service center familiar with analog synth repair, but third party installations are not supported by Synhouse. The average self-installation takes approximately one hour after reading the manuals. By comparison, it is simpler and quicker to install than an average automobile alarm system. The board mounts by drilling only four small holes for the screws, MIDI function button, and adjustment trimmer. All mounting hardware is included with purchase of the MIDIJACK, as well as 3 detailed installation and user manuals which describe the MIDIJACK theory and general installation method which will allow anyone to make their own installation in any compatible analog monosynth, providing that the user knows enough about the signal flow of the instrument to locate the proper cutting and connection points. Detailed instructions, diagrams, and photographs for selected popular synths can be found on this website under Analog User Modifications, but these are not necessary to perform this simple analog MIDI upgrade.

Synhouse Factory Installation

So tiny it fits anywhere     MIDIJACK icon

The MIDIJACK circuit board itself is only about the size of a single stick of chewing gum, less than 3" x 1". Having an extremely low profile, it can be fitted inside most analog synthesizers between the control panel and the circuit board behind it. It is even tiny enough to fit inside a Roland MC-202!


The Original MIDIJACK Quick Installation Manual must be read fully and understood completely to qualify for warranty coverage and technical support. Although MIDIJACK technical support is a part of the warranty, every reasonable effort is made to provide information to customers after that period has expired. The MIDIJACK is warranted against defects in parts and manufacture for a period of 90 days from the date of purchase. Warranty covers a single synthesizer application and becomes void if in the opinion of Synhouse Multimedia Corporation the MIDIJACK has been subjected to unauthorized service, modification, or unintended installation or usage. No liability is assumed by Synhouse Multimedia Corporation for any loss or damage, direct or indirect, resulting from the use of or inability to use the MIDIJACK. More Terms and Conditions

Want to read all about it?

Read the Analog User Manual Online

Read the Quick Installation Manual Online

Read the Advanced Installation Manual Online

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