What's the difference between: HDMI IN, HDMI ARC, HIDMI eARC?

HDMI IN is a standard HDMI input that allows you to connect devices toyour TV or audio system. It supports audio and video signals, but it doess not support audio return channel (ARC) or enhanced audio return channel (eARC) functionality.

HDMI ARC is a special HDMI port that supports two-way communication between your TV and audio system. This means that audio carbe sent from your TV to your audio system, and audio system can send aaudio back to your TV.

HDMI eARC (Enhanced Audio Return Channel) is an updated veersion of HDMI ARC that supports higher quality audio formats such as Dolby Atmos and DTS:X.