For those of you who have stereo only DAC such as myself, (Chord Mojo), you may have been pulling your hair out on games that autodetect Dolby Atmos / DTS Headphone X as stereo and therefore not working, such as Call of Duty MW2 Remastered, among many many others that think they know better than you.
Well after digging around I figured out the perfect solution using a program called HeSuVi. Best of all it is free and lets you use Dolby Atmos (or any other filter you can imagine) on anything. Also it has a very massive headphone EQ database built in, so you can make your headphones sound even better all the time.
Here is a guide that walks you through every single step needed.
sourceforge.net
You want to use Audio Repeater KS because there is no added latency or cpu cost. I used the Voicemeeter trick before this, and it adds a lot of unavoidable latency unfortunately. The only negative to any of this is that you can not control your volume anymore using your volume scroll wheel (you can still mute it though!), but my DAC has volume control on it so it isn't really an issue. You can still use volume mixer manually to control program volumes directly as well.
This solution btw apples virtualization to everything, so when you want to listen to music in stereo or just disable Atmos / DTS, you just swap to Stereo Mix in HeSuVi and it will be just like how Dolby Atmos / DTS Headphone X automatically ignore stereo content. I even made a shortcut on my taskbar that quickly toggles between Virtualization and Stereo Mix, just create a shortcut to HeSuVi and then add "-f d1" without the quotes to the Target command line. I tested for a long time going back and forth between the Dolby Atmos app vs Hesuvi Dolby Atmos, and it is identical to Dolby Atmos with Performance turned on.
Also, if you are going to play a game that actually supports Atmos / DTS (Object Based Audio) such as Ori or Gears 5, for those games you actually want to use the Windows app version, and not HeSuVi, as this doesn't replicate the Object Based Audio, it just replicates how Atmos / DTS convert 7.1 and 5.1 mixes.