If you have recently bought a smart TV or an audio device that can be connected to a TV, such as a soundbar or a home theatre system, you may have noticed multiple HDMI ports on the back. One of these ports may have a label indicating “ARC” or “eARC”, but what exactly does this mean? Is it necessary to use the HDMI ARC port instead of the regular HDMI port? Are there any benefits? In this article, we will discuss these questions and provide more information on HDMI ARC/eARC.