About 30 minutes into Top Gun movie the Sonos soundbar started making this loud piercing sound. I shut it down for about an hour, then put another movie on. Towards the end of the second movie the piercing sound came back. I opened a ticket with Sonos through chat last night and sent them diagnostics. They said nothing abnormal. I have limited time to return this thing to Amazon and right now I am ready to send it back. What could be causing this? The TV has ARC output, Roku feeds the TV. Brand new HDMI cable going to TV that came with Sonos. I don’t see how to attach a non URL video to this post, else I would attach the video I took.
Just bought Sonos Arc Ultra yesterday. First movie a piercing sound started.
I should have mentioned this is a brand new Sonos unboxed yesterday.
Call Sonos.
If they can't help then return it.
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