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The ARC stands for Audio Return Channel. This HDMI ARC port is used for connecting a home theater or sound bar system to the TV with the ability to connect another device through the audio system and not occupying an additional HDMI input on the TV.
Sorry, there was a problem. Please try again later.ARC stands for Audio Return Channel, and it lets you connect your audio system to multiple sound sources through your TV. Good explainer at https://www.tomsguide.com/us/hdmi-arc-faq,news-26262.html
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