Visual Productions CUECORE2 Manual page 14

Each GPI port can be switched between 'digital' and 'analog'. In the digital
mode the signal is held up by an internal pull-up resistor and results in a logic
'0'. The external equipment is intended to short the port's pin to the provided
ground pin. This short will create a logic '1'. All four ports share one common
ground pin.
When set to analog the external equipment is supposed to supply a voltage
between 0V and 10V to the port's pin. For convenience, a 10V supply is available
on one of the pins of the GPI connector. Please refer to figure 2.2 for the pinout
of the GPI connector.
as that might cause permanent damage.
Figure 2.3 shows examples of how to wire a contact-closure to a GPI port
set to digital. And it shows an example of potentiometer connected to a GPI
port set to analog.
(a) Contact-closure
Please refer to page 72 for more information on configuring the GPI ports.
Programming events based on GPI activity is done in the Show Control page,
which is discussed on page 53.
2.9 MIDI
The MIDI protocol is intended for inter-connecting musical devices such as syn-
thesisers and sequencers. Furthermore, this protocol is also very suitable to
send triggers from one device to another and is often used to synchronise audio,
video and lighting equipment. There is also a large collection of MIDI con-
trol surfaces available; user-interface consoles with knobs, (motorised-)faders,
rotary-encoders, etc.
The CueCore2 is fitted with a MIDI input and MIDI output port. It supports
receiving and sending MIDI messages like NoteOn, NoteOff, ControlChange and
ProgramChange.
2.9.1 MTC
MIDI Timecode (MTC) is the timecode signal which is embedded into MIDI.
The CueCore2 supports receiving and transmitting MTC. It is not recommended
to combine the use of MTC with ordinary MIDI as MTC consumes the band-
width of the MIDI connection.
Be careful not to supply more than 10V to the GPI port
Figure 2.3: GPI Wiring examples
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(b) Potentiometer