Luckily the audio industry as solved this problem, and they use PTP as the clocking mechanism for AES67 (kind of the bastard child of Ravenna and Dante, but with a fully open* AoIP protocol) that's designed for handling all the hard parts of sync'ing audio over a network. And it's used everywhere these days, but mostly in venues/stadiums/theme parks.
* open if you pay membership dues to the AES or buy the spec
* open if you pay membership dues to the AES or buy the spec