AES67
The lowest common denominator that lets rival audio-over-IP systems send audio to one another.
Around 2010 there were half a dozen systems for audio over Ethernet — Dante, Ravenna, Livewire, Q-LAN — all built on much the same ideas and none of them able to talk to the others. The Audio Engineering Society published AES67 in 2013 as an agreement on that shared core: uncompressed PCM in RTP packets, 48 kHz, 16 or 24 bits, clock sync over PTP (IEEE 1588), and streams usually sent as multicast.
The standard deliberately says nothing about how devices discover each other or how they're controlled, so vendors got to keep their ecosystems. That was the price of getting everyone to sign. SMPTE ST 2110-30, for audio in television production, builds directly on AES67, which turned it from an option into a requirement in the broadcast world.