to get DOLBY ATMOS you have to have DOLBY ATMOS HARDWARE one cant do a magic trick and preform DOLBY ATMOS on hardware that doesn't have the specification .
So you should have an ATMOS receiver/decoder and a speaker setup of at least 5.1.2 everything else is BULLSHIT !|
learn something :
https://www.dolby.com/us/en/guide/dolby-atmos-speaker-setup/index.html
What you people see as ATMOS is "ATMOS for Headphones" for PC which is pure PSEUDO 3D as many others already available and is 2ch STEREO.
You can hack drivers as much as you wish if the hardware doesn't detect ATMOS it will not encode anything therefore it wont work
Where do you want to hear 2 extra ATMOS channels that are channeling to the ceiling speakers ??
Much easier solution would be DTS:X as it doesn't require extra hardware but use a sort of Virtual method on existing 5.1 surround systems which now give us something like PSEUDO Atmospheric Surround audio , but tahts also not available for PC however most receivers that support Dolby Atmos support DTS:X as well .
more about this subject :
https://www.crutchfield.com/S-Ohvpw2GPWB6/learn/dts-x-vs-dolby-atmos.html