Presumably, another option is to use the aux digital output on the 210 to feed the secondary coax input on the speaker. I believe that, with the 3.16 firmware, the speakers will accept MQA on their coax input. Working this way, shouldn’t affect the surround delays, as the 210 is working as an independent source.
I thought about suggesting it this way round, but I don't know how this would work if the speakers were wired with twin wires (home run?) vs the legacy Daisy chain set up.
The initial idea would work if a Reviver or equivalent was used to link the 210 and co-ax input of the Master DSPs D2. This is how I connected an 808.2 directly to the main legacy DSPs. Which perhaps raises the question...
...how would one utilise an independent (ie non processor) source into D2 of the Master DSP when the speakers are home run wired?
Cheers
George