I have a Vizio P series (4K Smartcast) and decided to pick up a Mi Box for Sling TV/PS Vue, since they're just kind of clunky only casting them. I'm finding that the audio sounds considerably worse through the Mi Box than through Google Cast straight to the TV. The biggest difference is in Netflix. It sounds low quality, and there are drastic changes from quiet to loud. I'm running a 5.1 sound bar system, over HDMI ARC. I've tried the three different audio settings (PCM, HDMI, and SPDIF), but I don't notice any difference between any of them, nor do I know what is actually changing between them. Is this an issue with the Mi Box or am I do something wrong?
I don't even get surround sound from my MiBox... (my receiver supports DD+)