Aristotle
TK Veteran
I have seen users on Reddit mention that they have cleaned their Shield internals out and also reapplied thermal paste and it has made the device run a lot better.My2019 shield pro works well, can't recall any audio issues with it. It might be worth trying a different HDMI cable or fiddling around with the audio settings.
The KM2 Deluxe will be the same as the homatics.
If you want certified, perhaps go for the google tv streamer or the Firestick 4k max? The google tv streamer is 25% off now with a blc code.