I am in charge of installing a distributed sound over 80 buildings. Each building has older copper pairs running to them with little chance to pull new wires. Each building also has a spare cat 5 that runs audio via baluns. The two are not time aligned, and the difference is not consistent between buildings.
This system is rarely used but if needed is the difference between life and death for those listening. Any auto mixer or ducking solutions to turn on whichever one of these systems is working?