What is the Audio Return Channel (ARC) feature?

Does the projector support “Audio Return Channel”? How do I use it?

HDMI eARC vs. ARC: Everything You Need to Know

All You Need to Know About Audio Return Channel (ARC)

Verify whether the TV has an ARC label on one of its HDMI ports

HDMI ARC Output as Audio Input?

What Is HDMI ARC (Audio Return Channel)?

ARC and eARC: The Audio Feature that Enhances Your Home Theater Experience

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

Hdmi Arc Adapter

HDMI ARC: How the HDMI Audio Return Channel works - HubPages

HDMI ARC support is the best feature of the latest Apple TV 4K — Cameo Pro Consulting

3-In-1 4K HDMI Audio Extractor Embedder With HDMI ARC Audio Converter