I've talked with an electrical engineer who works for QSC on the part of their business that deals with large, coordinated installations. They run huge, theme

I've talked with an electrical engineer who works for QSC on the part of their business that deals with large, coordinated installations. They run huge, theme park-sized systems over COTS networking gear (read: Ethernet) with audio synced within hundreds of nanoseconds at locations hundreds of meters apart. It's doable, but you're not going to see it in normal consumer hardware.