Kenton GPIM-16 User manual

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16 gpi inputs to midi
Operating manual

2
INTRODUCTION
Welcome to the GPIM-16 - GPI to MIDI unit. The GPIM-16 is very easy to use, but please take a few
moments to read through the manual to avoid any operational difficulties.
CONNECTIONS
MIDI In
This is provided in order that you can ‘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 GPIM-16 units that can be daisy chined
together as the data is re-generated rather than being merely copied.
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 with locking type
plugs. Do not use an adaptor with an output voltage higher than 9V, and the GPIM-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 GPIM-16 and/or the power supply.
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 GPIM-16
Connect your GPI inputs to pins 1 to 8 of the 9 pin D connectors – pin 9 is the ommon ground
connection. Connect any other MIDI source to the MIDI input and connect the power supply.
When power is applied to the GPIM-16, the words KENTON GPIM will scroll across the display, then
three horizontal bars will show, indicating that no GPI input has recently been received.
The factory default settings are listed on the last page.
Various parameters can be edited and stored – see the section on editing for more information.
The GPIM-16 also contains a MIDI analyser – see the MIDI analyser section for more information.
Connections for the GPI inputs are on 9 pin D connectors. Below is the view looking at the back of the
unit and is the same view as looking at the solder connections of the corresponding plug.
Pins 1 – 8 are the input pins and pin 9 is the common ground connection. The input pins are internally
pulled up by 4K7 ohm pullups to +5 volts. Shorting an input to ground (pin 9) activates that input.
52 4 3
9
1
8 7 6

3
EDIT MODE
To put the GPIM-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.
When the required value has been set, either press the mode button again to select another
parameter, or press the edit button again. This will return you to normal operating mode again and
save all the settings you have changed. Note that settings are not stored permanently until you leave
edit mode. Settings are stored in non-volatile eeprom memory.
Note also that the GPIM-16 will continue to function normally during the edit process, except that the
display will not indicate an activated input.
Edit parameters:
‘chn’ - select the MIDI channel which output MIDI messages will be sent on
available values – 1 to 16 – default =1
‘nn1’ - set the note (or cont or prog) number for GPI input number 1 (2 to 8 follow consecutively)
available values – 0 to 127 – default =36
‘oF1’ - set whether MIDI off messages are sent for GPI inputs 1 to 8
available values – yes or no – default =yes (note: program changes do not send off messages)
‘nn9’ - set the note (or cont or prog) number for GPI input number 9 (10 to 16 follow consecutively)
available values – 0 to 127 – default =44
‘oF9’ - set whether MIDI off messages are sent for GPI inputs 9 to 16
available values – yes or no – default =yes (note: program changes do not send off messages)
‘dEb’ - set the debounce value for all GPI inputs – value shown in milliseconds (approx)
available values – 1 to 100– default =10
‘out’ - set the output MIDI message type for all GPI inputs
available values – ‘not’ (notes) , ‘con’ (controllers) or ‘prg (program changes) – default =notes
MIDI ANALYSER
Power the unit on while holding the ‘dec’ button pressed. The display will show the firmware revision
nuber until the button is released; the display will then show ‘ntn’. Use the inc and dec buttons to
change the type of MIDI data which will be displayed, according to the following table:
‘ntn’ – note number
‘ntv’ – note velocity
‘ccn’ – controller number
‘ccv’ – controller number
‘chn’ – MIDI channel number
‘prg’ – program number
‘sxn’ – sysex no – shows ‘sxy’ – sysex yes if sysex is being received
‘tcn’ – timing clock no – shows ‘tcy’ – timing clock yes if timing clock is being received
‘clk’ – clock status – shows ‘stt’ for start, ‘stp’ for stop or ‘cnt’ for continue
Pressing all three buttons mode, dec and inc together will exit analyser mode and return the unit to
normal operation.

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FACTORY DEFAULTS
If you want to reset your GPIM-16 to its factory default settings, you can do so by applying power to the
unit whilst holding the recessed edit button pressed.
`def` (factory defaults) will momentarily be displayed when this has been done.
The factory default settings are:
MIDI channel #1
GPI 1-8 midi notes 36-43,
GPI 1-8 MIDI off enabled (yes)
GPI 9-16 midi notes 44-51
GPI 1-8 MIDI off enabled (yes)
Debounce time 5mS
Output message type=notes
DISPLAYING THE FIRMWARE VERSION NUMBER
Power the unit on while holding the ‘dec’ button pressed – keep pressed while you read the number.
When you release the button you will be in analyser mode. Pressing all three buttons mode, dec and
inc together will exit analyser mode and return the unit to normal operation.
SPECIFICATIONS
Power Input 9V DC – mains adaptor supplied
Power consumption 100mA, 2.1mm plug (centre positive)
MIDI In, Out1 & Out2 (out1 & out2 give the same data out)
Inputs 16 GPI – 8 on each of 2 x 9 pin D connectors – pin 9 common ground
Display 3 x 7 segment display
Weight 850 gms including PSU
Dimensions 190 x 110 x 38 mm
Non-volatile memory EEPROM (no back-up battery required)
WARRANTY
The GPIM-16 comes with a 12 month (from purchase date) back to base warranty, (i.e. customer must
arrange and pay for carriage to and from Kenton Electronics).
Brookfarm House, 1 Station Road, South Wimbledon, London, SW19 2LP, UK
Tel: [phone] Fax: [phone]
[email protected] www.kenton.co.uk
firmware rev# 1138 e. & o. e. 21st February 2008