UBP-X800 BD Player & HT-ST5000 Sound Bar issue with Dolby Atmos

[Kwt1947]

How can you check or see that a 4k Blu-ray disc which is marked a Dolby Atmos capable is delivering in Dolby Atmos via this soundbar? I have the required quality HDMI cables for 4k content. There's no display on either the player or the soundbar that Atmos is enabled or being delivered. Thanks.

[Kobe-1]

Sony x800 does not say dolby atmos just true hd 7.1 but it is actually playing atmos