If you cannot get Dolby Atmos for free and don't want to pay, Microsoft offers Windows Sonic .
The software makes your two drivers simulate 3D space. That is what costs money. dolby atmos free for pc
For those using standard stereo headphones, Dolby offers a of their "Dolby Atmos for Headphones" technology. This virtualizes a surround sound environment using any pair of headphones. If you cannot get Dolby Atmos for free