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Having trouble with the surround speakers on my home theatre setup. Whenever I watch a movie with surround on apple TV the rear SL speakers keep stuttering making the movie unwatchable.

Setup: Arc + 2 Gen2 Subs + 2 SL surrounds.

TV is a 65” Samsung QN95A with audio set to passthrough

1m Sandstrom Gold Series HDMI cable to HDMI3 (eArc) on TV.

Apple tv is connected to HDMI2 with a 1m Sandstrom Gold series cable as well.

Everything is connected to the local wifi network.

When the movie title screen is displayed the music plays perfectly though the surrounds but when the movie is played the rear speakers stutter and pulse.

Diagnostics Number: 290032232

When I changed the ATV Audio output option from “Auto Dolby Atmos Available” and forced it to Dolby 5.1 the stuttering went away. Not ideal as I would like the ATV to be able to send Atmos when available.

Try removing the One SLs as surrounds from the Arc and unplug the Arc and One SLs from power for a couple of minutes. Plug everything back in and add the One SLs as surrounds again.

I would also reboot the Apple TV and consider using the Sonos-supplied HDMI cable for the Arc.

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