What is HDMI ARC, And Do I Need It? – iVANKY

ARC refers to the Audio Return Channel. It is capable of providing two-way communication between devices over a single HDMI connection, using the HDMI interface as both video input and audio output. In short, ARC allows us to utilize a single HDMI cable to transmit audio and video simultaneously.
When you buy a new TV, have you ever notice that beneath some of those HDMI ports on the back of TV are the letters ARC? What these letters represent could actually make it easier for you to set up a home theatre, possibly saving you some money. 

What Is Arc HDMI?

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HDMI ARC and eARC: Audio Return Channel for beginners - CNET

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What is HDMI With Arc; Similarities & Differences Between HDMI and HDMI ARC

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How to use HDMI ARC feature with Smart TVs

HDMI ARC/eARC: the one-cable TV audio tech fully explained

HDMI ARC and eARC: Audio Return Channel for beginners - CNET

What is the Audio Return Channel (ARC) feature?

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