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INTRODUCTION
Welcome to the GPMX-16 - GPI to MIDI unit. The GPMX-16 is very easy to use, but please take a few
moments to read through the manual to avoid any operational difficulties.
CONNECTIONS
DC IN 9V
Plug the power adapter into here. The unit will take an adapter with an output of 9V either regulated or
unregulated. The socket is a 2.1mm type with centre positive and is compatible with locking type plugs.
Do not use a power supply with an output voltage higher than 9V, and the GPMX-16 must not share an
adaptor with any other device. Failure to observe this will invalidate your warranty, and will probably
damage the other device, the GPMX-16 and/or the power supp
ly.
MIDI In
This input allows you to control the GPO outputs using MIDI. It also allows you to 'daisy chain' several
boxes together. Any data received at the MIDI In socket is merged with any new data generated from
the GPI inputs and everything is then sent to the MIDI outs 1 & 2. There is no limit to the number of
GPMX-16 units that can be daisy chained together as the data is re-generated rather than being
merely copied.
MIDI out 1 & MIDI out 2
MIDI out 1 and MIDI out 2 carry identical MIDI information. The second output is provided so that data
can be set to a backup computer system at the same time as supplying the primary computer.
DISPLAY
The display has several functions; In normal operating mode, the display will show three horizontal
bars until a GPI input is received, it will then show a number between 1 and 16 to indicate the GPI input
which was activated. Note that if two inputs are received in quick succession, it will show the later one.
After a couple of seconds, the display will revert to the three dashes display. In this mode, the dots
above the display will indicate MIDI In and MIDI out activity.
The display is also used for editing, which will be dealt with later.
USING THE GPMX-16
GP Inputs are on pins numbered 1 to 8 of the 9 pin D socket connectors (the lower ones) – pin 9 is the
common ground connection.
GP Outputs are on pins numbered 1 to 8 of the 9 pin D plug connectors (the upper ones) – pin 9 is the
common connection.
When power is applied to the GPMX-16, the words KENTON GPMX will scroll across the display,
then three horizontal bars will show, indicating that no GPI input has recently been received.
Various parameters can be edited and stored – see the section on editing for more information.
The GPMX-16 also contains a MIDI analyser – see the MIDI analyser section for more information.
EDIT MODE
To put the GPMX-16 into edit mode, use a screwdriver or pen to press the recessed edit button. The
edit dot will light to show that it is in edit mode. The para dot will also light to show that the required
parameter can be changed by using the inc & dec buttons. When the required parameter has been
selected, press the mode button. The para dot will go out and the val dot will light to indicate that the
value can now be changed by using the inc and dec buttons.
2
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