I have a Sonos arc paired with the gen 3 sub connected to my Sony xbr900e connected via arc(not earc) . Everything was working fine until a few days ago and now my audio is constantly cutting in and out. I have swapped hdmi cables, power cycled both tv and soundbar, factory reset my tv, and nothing has fixed it.
Arc audio cutting out
Best answer by Ken_Griffiths
I think I may have solved it, I think there maybe something wrong with the hdmi port on the sonos side. If I held the hdmi cord firmly against the hdmi port while doing the tv setup, setup detected the sonos. If I didn’t hold the wire then setup would fail. I tried this a couple times, and each time I held the wire the tv setup worked , otherwise it failed. I know this sounds weird and unlikely, but it worked for me.
Maybe first try another HDMI cable (preferably the one that came with the Arc and one other) .. if the issue remains, I would perhaps try to capture that ‘poor connection’ on video, if that’s at all possible, aswell as submitting a Sonos diagnostic report (make a note of the diagnostic reference) - then contact Sonos Support via this LINK and send them the information gathered and see what they advise.
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