My 2nd tv only has an arc connection and I'm wondering if I can use a  4k hdmi 2.1 splitter between my nvidia shield, xbox and tv so that I can take advantage of the  eArc connection in the splitter so improving the sound quality delivered to my Sonos Arc. Would this work, giving true atmos and if so which  4k hdmi 2.1 splitter would people recommend?

Thanks in advance