Most of smart TVs are generally equipped with HDMI ARC port. If your sound system has ARC input, it will allow you to enjoy better performance through a single HDMI cord.
If you have multiple sound receivers and don’t want any one of them is sitting idle. A simple solution allows them to work simultaneously is digital optical audio splitter, which is is also referred to fiber optic splitter or SPDIF toslink splitter.
If you need more HDMI 2.0 ports and extract audio from source devices to your audio receiver simultaneously, the best solution is HDMI 2.0 switch with audio output, which can simply be considered as the combination of HDMI 2.0 audio extractor and HDMI 2.0 switcher.
Smart TVs equipped with buit-in OS and installed apps (such as Netflix, Amazon Prime Video, HBO,etc.) have been more and more popular, It’s more convenient to enjoy movies, music, online games without extra source devices required.