In 2017, HDMI 2.1 introduced eARC, which added support for high-end surround sound such as Dolby Atmos and DTS:X. eARC also supports variable refresh rate (VRR), quick media switching (QMS ...
If you have an Nvidia graphics card, you might have seen Nvidia High ... at least one audio-capable display connection (usually HDMI or DP), and your display (monitor or TV) should also be audio ...