I received a 75 in Q94a tv yesterday. It's connected to Samsung Q90r soundbar, which is plugged into HDMI SOCKET 3, FOR eArc.
I started the on-board Disney+ app and Netflix app. Both apps display Atmos in the description, next to 4k/HDR, but the sound coming from the soundbar was just Standard on both apps. Soundbar displayed eArc. I closed the apps and tried again, but sound description on both apps had reverted to 5.1.
The HDMI ARC option is now greyed out on the tv set.
Can anyone help and tell me what I'm doing wrong?
Sky Q movies output Atmos without any issue.