Odds are your Apple TV is plugged into the wrong HDMI port

Not plugging your Apple TV into the right HDMI port could result in a lower quality audio. Make sure it's set up right for ...

Your Roku is probably plugged into the wrong HDMI port - here's why

You can watch plenty of movies and TV shows with Roku. However, setting up the device incorrectly and plugging it into the ...

Does picking the right HDMI port on your TV matter? Short answer: More than you think

All HDMI ports can carry video and audio, but they support different bandwidth levels, which determine the devices you should use with them. If you happen to plug into the wrong HDMI port, nothing ...
Ars Technica

Computer audio over HDMI into HDMI ARC input?

I've been trying to get my laptop to send audio over the HDMI output into the HDMI ARC input on a new amp. Didn't work with the 11yo v1.2 cable I'd been using but also doesn't work with the one ...