MX-4 USER GUIDE CHAPTER 13
118
USING A GPI DEVICE
You can connect a GPI (General Purpose Interface) device to the MX-4. The GPI device can trig-
ger an event from an external source, such as a push-button switch or an edit controller with GPI
output. A GPI device is especially useful when you are positioned some distance away from the
MX-4 but still want to be able to control its operation.
A GPI pulse causes the MX-4 to behave exactly as if the play button were pressed. Normally, it
starts a transition you previously set up. If you are playing back a Learned sequence (refer to Chap-
ter 11, Learn Mode), it triggers the next event in the sequence.
An edit controller or computer that provides a contact closure can also serve as a GPI triggering
device.
WARNING
Do not connect a power source of any kind to the Control GPI input connector on the MX-4.
Doing so can damage the equipment and void your warranty.
You can use a remote push-button device to trigger events on the MX-4. If you already have a GPI
device you want to use, refer to “Live Broadcast Configuration” on page 38 to learn how to con-
nect the device. If you do not have a GPI device but would like to build one, refer to the instruc-
tions in the next section.
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