With the ARC and eARC features, a single HDMI connection on the TV can be used both as the HDMI input and the audio output to the soundbar or a surround sound
How do I hear TV sound through the A/V Receiver or Home Theater System speakers?
How to play Dolby Atmos format audio using a Multi Channel AV receiver or Sound Bar
HDMI ARC and eARC: Audio Return Channel for beginners - CNET
[AUDIO EXTRACTION] Simply put, the HAX05 acts as a “translator” that converts HDMI ARC audio signals into digital or analog formats for ultimate
Avantree HAX05 - HDMI ARC Audio Converter TV Sound with Pass-Through Capabilities, Optical & Analog Audio Output, and CEC Support
HDMI ARC and CEC not working? Try these fixes
Report: latest AVRs from Sony, Denon / Marantz, Yamaha, etc. have a bug in the HDMI 2.1 chip - unable to pass through the 4k120hz HDR10 signal (german article) : r/xboxone
What is eARC and how is it different from ARC?
How to play Dolby Atmos format audio using a Multi Channel AV receiver or Sound Bar
How To Use HDMI ARC Port on LG Smart TVs
HDMI 2.1b Specification Overview
HDMI ARC and CEC not working? Try these fixes