We manufacture a large and ever increasing range of midi control boards that can be used with either Hauptwerk, SoundFont systems such as Miditzer and jOrgan, or expander units.


Basically, these boards are wired to the keyboards, pedalboard and, optionally the stop switches to provide midi outputs on different channels.


There are two different approaches to this:


The first method which is the simplest and cheapest is to use a combined unit.  A number of scan boards which are available in 32 and 64 way versions are fed into a common processor board which provides a single midi output on a number of different channels which can be specified by the user.


The most common system would comprise two 64 way scan boards for the swell and great (upper and lower) keyboards, and two 32 way scan boards for the pedals and stops.  These are fed into a processor board which produces a single midi output, using channel 1 for the swell, 2 for the great, 3 for the pedals and 4 for the stops.  The user would then connect a midi cable from this output to a computer, and with suitable software, a two manual and pedal organ can be realised.


There are two processor boards available, the two manual can take up to three 64 way scan boards and two 32 way, the 3-4 manual can take up to six 64 way and two 32 way boards.  Any scan board can be designated as keys or stops and any required midi channels can be specified.




Two manual processor board                                                            98.00

Three/Four manual processor board                                                124.00

32 way scan board                                                                           28.00

64 way scan board                                                                           46.00

Power supply (One required per system)                                           10.00


Combined units work well with small organs, but all the midi signals coming from the organ have to be channelled to one output and this can cause delays when playing fast on larger organs especially when using couplers.






With separate systems, each keyboard/pedalboard/set of stops has its own midi output.  These should be combined at the computer with a multiport midi/usb interface.  Edirol and M-Audio are two companies that produce suitable units for this purpose.  The usb bus works several hundred times faster than a midi interface.  This enables it to handle multiple midi inputs with no delays or loss of data (subject of course to the controlling software).


You should NOT use a midi merge unit or you simply end up with the same limitations as a combined system and you may also experience loss of data.


Some midi encoders, supplied by other companies, feed the midi output from one keyboard into a midi input on the next keyboard encoder and this “daisy chain” is repeated throughout the system, again the same problem as with the combined unit will occur on larger systems.




32 way scan board/encoder                                                              66.00

64 way scan board/encoder                                                              86.00

Power supply (One required per system)                                           10.00





All computer based systems and most expanders require volume control information to be fed into them via midi.


All of our systems can do this and for a straightforward volume control, there is simply a £10 programming charge for every division that you want to control.


Swell pedals are more complicated, since a swell pedal potentiometer only has a limited arc of travel and the limits of this travel vary from one organ to the next.  We therefore provide an additional PCB with a preset on it and this can be used to ensure that whatever the travel of the swell pedal potentiometer, the full range of volume is available.  This is provided together with a matching replacement potentiometer for the swell pedal itself.  The cost of this kit, which includes full wiring and adjusting instructions is £30.