OK, based on some wonderful advice I received on this forum, I found some extra money to put in my Home Theater budget and purchased a refurb HT-SR800 from accessories4less. I'm really happy with it ...
XDA Developers on MSN
tvOS 26.4 adds a new setting to fix Apple TV 4K audio popping issues
"Continuous Audio Connection" seems to solve audio issues with Sonos speakers.
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