Axia Quasar User Manual page 109

Second, there's Pathfinder's VMix Control feature. This is a software fader control option that is
provided with the PRO versions of Pathfinder. VMix Control brings the operation of VMIX out of the
background and provides a graphical user interface with software faders, as shown here.
There are several other ways that Pathfinder can be used for background control of VMix. VMix
functions can be used both as qualifiers and actions in routing salvos. This means that a designer can
select GPIO triggers, time based events, user button pushes, serial port commands, and other options
and combinations of options to decide when to make changes to any Virtual Fader in a VMix. The user
can make a gain change based on these events, turn a channel off or on, and or adjust the fade times,
giving complete control over the VMIXer based on any of the stacking events qualifiers.
Finally, Pathfinder's Software Authority protocol translator includes commands to control any VMix
fader that's active, so any machine that can send user defined serial or TCP commands can also control
and read VMix functions through Pathfinder.
Using these techniques VMIX can be used as a fully automated virtual mixer in the background of each
console.
GPIO control of your VMIX with Pathfinder
Imagine that you have a night jock that should monitor all four radio stations in your cluster. To help
make sure this actually happens, you could send all four off-air signals as sources into a VMix submixer,
and take the output of that submix to a monitor. A Fusion accessory panel or external button wired to a
GPIO port could then provide a
"press and hold" function to allow the jock to monitor the sources momentarily. (This example is only
possible with Pathfinder control of VMix.)