Does Roon fulfill hard requirements on zone sync?

[Rugby (aka Daniel or Big Dan)]

Here is one, no resolution though

What about using 3 Mytek DACs for multichannel?

I have been running 3 Mytek Brooklyns via a USB hub which MacOS can aggregate into a “virtual” 6 channel DAC. JRMC sees each individual DAC as well as the aggregate device which permits 5.1 playback. Roon sees only the three individual DACs.