User Manual

“GPI” dialog box Chapter 7. Dialog boxes/Software applications
MTX-MRX Editor User Guide
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❑ “GPI” dialog box
GPI stands for General Purpose Interface. By using the GPI input/output, you can remotely control
the MTX/MRX via custom-made controllers or external devices. A controller that is connected to
the GPI input connector can be used to switch presets on the MTX/MRX or to control the
parameters of components. GPI input/output settings are made individually for each device.
Display devices such as LEDs and lamps or external control equipment made by other
manufacturers can be connected to the GPI output connector, letting you control the external
device according to the state of presets or parameters.
For hardware-related details such as how to connect the [GPI] connector, refer to the owner’s guide
of each unit.
<Usage example 1>
Using a home-made switch panel to switch presets
Connect a momentary switch to each of the MTX/MRX’s [GPI IN-1] through [GPI IN-3]
connectors, and make settings so that they will recall Preset1–3.
<Usage example 2>
Controlling the volume of the MTX/MRX
Connect a variable resistor to one of the MTX/MRX’s [GPI IN] connectors, and assign
Output Ch Level to the GPI Input Port so that the volume will be controlled.
<Usage example 3>
Controlling the volume of multiple MTX/MRX units
Connect a variable resistor to one of the MTX/MRX’s [GPI IN] connectors, and assign
ZONE Out DCA Group to the GPI Input Port so that the zone volume of multiple
MTXMRX units will be controlled in tandem.
This dialog box can be edited only while offline.