nvidia.custhelp.com
I use reshacker found a dialog box on nvhdap64.dll which show support DD/DTS format
NVIDIA High Definition Audio driver use Microsoft HT APO, not NVIDIA APO.
To use NVIDIA APO, clear all GUID in processing mode & effects configuration, enter
Local FX APO:
{B48DEA3F-1234-425a-8D9A-9A5BB37A9904}
Global FX APO:
{06687E71-1234-403A-BF49-CB591BA6E103}
Apply Effects and Processing Mode Configurations ->restart audio services
Idk how to get that "Advanced" dialog box from nvidia control panel
Another news is that Dolby Access 3.0.3340.0 with New UI available on
Windows 10 19H1
However, Dolby Atmos UWP apps cannot new version of Dolby Atmos for Headphones.
May be New Dolby Access settings similar with Dolby Atmos UWP apps, so they remove OEM unlock?
Tell me whether Dolby Access auto unlock if you have a laptop support Dolby Atmos.