Yesterday Xbox Dolby Access app got an update and now supports "Dolby Atmos Upmix" which you can activate in the app.
Just wondering if that has any impact how it works with Soundbar or through C9?
I have read through this entire thread and it has been very interesting but also disheartening. I bought a Panasonic GZ1000 and the HW-Q90R soundbar together. Neither have eARC bit unlike Samsung, Panasonic has made no promises to add it. I'm still holding out hope that both companies will add this feature via a firmware update but I'm not holding my breath either.
Anyways, I want to let people know about some other issues with this soundbar. The Atmos is great and it sounds very good. However, there are two glaring problems. 1) It does NOT allow Dolby Vision video passthrough from either an Xbox One X or Apple TV 4K. I bought two 8K/48Gbps HDMI cables to rule that out and all settings are set correctly. It simply does not pass through Dolby Vision from my two sources. Thie is very annoying because these are common sources and I bought the GZ1000 specifically for its ability to accept all HDR formats. The fact that Samsung has decided to not include Dolby Vision on a soundbar that is sold independently of their TVs is inexcusable. I don't care if they think theor HDR10+ needs help getting traction. 2) When try passing the signal through my TV to the bar via ARC I get Dolby Vison but also lip-sync issues that the bar's SYNC settings' coarse 25ms adjustment can not fix. So either i get the best video quality or sound quality but not both... This what led me to this forum because eARC should theoretically fix the lip-sync problem. Why this is even an issue with top of the line TVs and soundbars is beyond explanation and not. a eingle sales person or reviewer mentioned these problems during my extensive research before buying these two items. I hope this info helps others make more informed buying decisions.