“can I connect ATV4k with optical and use HDMI for Netflix from my TV? I'm really confused about conflicting info with ATV4k and cables. how would this work on the ARC to get true Atmos?”
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In order to get Atmos from an Apple TV you must have a television that supports eARC instead of the traditional ARC. Apple uses a format of Atmos that can only be passed through the higher bandwidth eARC connection that is only present on very new televisions. Digital Optical lacks the bandwidth to pass any Atmos signal.
Sorry, there was a problem. Please try again later.Optical doesn't support Dolby Atmos, so you won't want to use that. You'll need to connect your Apple TV to an HDMI input on your TV (HDMI 2 for example) using an HDMI cable, and the Sonos bar to the ARC-enabled HDMI connection on your TV (which is probably HDMI 1) using a second HDMI cable.
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