So I recently picked up the Sonos Arc + Sub and a Samsung Q90T TV (which has HDMI 2.1/eArc) and I am experiencing the sound cutting out periodically. Some details:
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Only devices I can test with are an Xbox One S, Xbox One X and the built-in Samsung TV Apps
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Sonos, Xboxes and Saumsung are properly set to have Dolby Atmos
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I have experienced sound cutting out on both Atmos and 5.1
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I have experienced sound cutting out from both the Xboxes as well as the built-in Samsung TV Apps (only tested the Netflix app) . . . so I know the Xboxes aren't the issue
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At times the sound cuts out very infrequently (minutes apart) and other times about every 10 to 20 seconds and there is no discernible pattern on what changes this.
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There is a sound setting on the TV showing ‘sound output’ that should should normally say ‘Receiver(HDMI-eARC)’ when you have the ‘HDMI eARC Mode’ set to ‘auto’ but sometimes shows ‘Receiver(HDMI)’ instead (as if it lost the eARC signal).
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The most stable I have seen the sound (though it did cut out once during a 30 to 40 minute session, so perhaps it is just much less likely) is if I go to the Samsung TV settings and set ‘HDMI eARC Mode’ to ‘off’ (only other option is ‘auto’). When doing this Dolby Atmos still works (at least it says so in the Sonos app).
I don't know if this is a Samsung issue, a Sonos issue, or just the two of them working together. Curious if this is some form of eARC / HDMI signaling issue.
Perhaps related side-note: the Samsung settings do say when playing with the settings it may cause temporary muting, which is kind of what this is, so wondering if when in 'auto eArc' mode, there is a problem. Unfortunately there is no way to force on, just 'off' and 'auto'.
On reddit, someone with a Samsung Q80T also said they had this issue. They also mentioned that toggling ‘Dolby Atmos compatibility’ fixed it (though obviously no Atmos). My experience was more temperamental. Sometimes it got better and sometimes it didn’t.
Anyone else experiencing anything like this?
