[chgs]

Sofie drives the matrix (black magic videohub for small ones like the 120 squared, but ours are 1000+ which black magic won’t do), the audio mixers, the video mixers, the graphics and by machines (Caspar), etc. your mixers don’t need that many inputs - a typical one might be 24 or 32 inputs with a few ME banks.

All these devices use standard protocols, or it’s just a new plugin for sofie ti drive it.

Of course increasingly the industry is using 2110 on spine and leaf networks rather than SDI. I don’t know if there any COTS mixers aside from the vmix/obs level, I believe some 2110 controllers will provide video matrix style interfaces. Nmos seems challenged in this area from what I hear.