[couto27]

My AVR doesn't do 4K 60HZ pass-through.
I also noticed out of sync when going directly into it.

So I opted for Shield -> TV -> ARC (or optical) -> AVR

My TV is Samsung S8000SX (4K SUHD)

My AVR is also Samsung 7.1 (but only 5 speakers + sub).

I can't seem to find a good audio output setting on in KODI / Shield.

I would like all stereo (usually music) to go to all speakers.
I also never listen to 7.1 sources. Just 5.1.
I can't seem to get this to pass through correctly (always seems to come out as stereo).

However, the PS4 seems to be fine with surround pass through...

I have the 2015 Shield with the latest 5 update.

Any ideas?

it depends what your TV model supports from HDMI out > Optical > Receiver or HDMI ARC out > Receiver.