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 to convert the HDMI ARC audio output of a television to analog audio RCA jacks - Quora
OREI HDMI (eARC & ARC) to RCA L/R Analog Audio Converter With 3.5mm Jack Support Headphone/Speaker Outputs - HDMI ARC to Analog Audio Converter. : Industrial & Scientific
HDMI ARC/eARC Not Working? Let's Troubleshoot! - AV Access
I have HDMI arc output on TV and want to receive TV audio to an A/V receiver that does not have an HDMI arc at all, just has HDMI ports. Is it
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HDMI ARC/eARC Not Working? Let's Troubleshoot! - AV Access
McIntosh MHT300 Home Theater Receiver
How to Connect Your TV to a Receiver, Soundbar or Home Theater, Even Without Audio Outputs: BigPictureBigSound
HDMI ARC and CEC not working? Try these fixes