It took me a while to get around to swapping my stuff around to try this out and somehow, I just don't seem to get Atmos. I've got the player connected to HDMI2 on my Panasonic SC-HTB900 which supports Atmos. I've checked the player settings and made sure that everything is set to bitstream and secondary audio is off, but when I play a 4k disc with Atmos, such as "1917" or "Rise of Skywalker" the sound bar reports that it's receiving Dolby True HD, not Atmos. Bringing up the info screen for the UB400 also shows Dolby True HD, not Atmos. I'm stumped. To be fair, it sounds great, but in typical FOMO I wanted to see 'Atmos' somewhere Does anyone have any ideas?Yes it does. Dolby Atmos on disc is delivered using Dolby TrueHD, so as long as a player can output bitstream TrueHD over HDMI, then by default it supports Dolby Atmos. And as pointed above, you need to turn secondary audio off.