My problem I have is that DTS HD-Master Audio is not being passed through to my AV receiver when appropriate material is played from an app on the TV. I have a Denon x2700H AV receiver and an Nvidia Shield TV device  directly attached to the TV. TV to AVR is via eARC HDMI.

When I play a DTS-HDMA source from any app on the TV (PLEX or File Manager or Media Player) the audio is not passed through. DTS HD_Master Audio is downmixed to  DTS.  If I play the same source from the Nvidia Shield TV (Itself an Android device)  DTS HD-MA is correctly passed through and this is shown on the Denon AVR. So "Passthrough" works but not direct play.

The same occurs whether the Digital Output is Auto1, Auto2 or PCM. Passthrough=auto. Atmos and Dolby codes passthrough is OK so connectivity is not the issue.

Any thoughts please? I bought the TV specifically to play DTS HD-MA so I am rather dissapointed if this cannot be corrected. I was hoping to retire the Nvidia Shield.

Thanks,

Ian