So, as expressed above, new 9.2.4 owner and while I managed to get nice sound out of it, I can't seem to make the "best" configuration work
This is what Plug & Play Matching Tool recommends:
XBOX One >> TV HDMI #1
SW 9.2.4 >> TV HDMI #2
(ARC) (Naka cable)
FireTV Stick >> SW HDMI #2
(direct connect - no cable)
TIVO >> SW HDMI #3
(old but in perfect working condition generic cable)
Oppo >> SW HDMI #4
(old but in perfect working condition premium cable)
Problem is I get no video signal this way.
I was able to get nice sound if I connect the BDP to the TV, so ARC is working.
I was able to get video via ARC connection and not great sound (somewhat surround) by plugging Fire TV on SW HDMI #3
(not on SW HDMI #2
I tried swapping some cables around to see if it made a difference (it did not, although I haven't tried all combos)
TV: Panasonic 55' Plasma P55VT60 circa 2013 (3 HDMI 1.4 Inputs, 1 ARC)
Streaming Device: Amazon Fire TV Stick 2nd Generation - 2016 release (1st with Alexa integration, Dolby Audio 5.1)
Blu-ray Player: Oppo BDP-93 (HDMI 1.4, Stereo, up to 7.1ch high-resolution PCM, up to 5.1ch DSD, bitstream or LPCM conversion of Dolby Digital, Dolby Digital Plus, Dolby TrueHD, DTS, DTS-HD High Resolution Audio, and DTS-HD Master Audio)
DVR: Tivo Roamio TCD846510 500GB circa 2013 (HDMI 1.4 at best - never seen 3D over the air, so maybe 1.2?)
Gaming: Xbox One Forza Motorsport 6 Limited Edition (2015 - HDMI 1.4)
Now, I fully understand that NONE of my devices support Dolby Atmos, but I was hoping for a partial solution via upmixing until I replace each piece. Using Oppo on the TV provided some really nice sound - way better than previous AVR (Denon AV-300, entry level 2016 or so). So this is not about not having Atmos, but just not having a usable configuration at the moment.
Any ideas on best course of action I should take? Am I limited by the content protection protocol? HMDI itself should be backwards compatible right?