I use the baked-in "Windows Sonic" surround sound (7.1) that comes with Win10 - checked off in the headphones tab, spatial sound, under the "sounds" control panel - works well enough I'd say with speakers attached to the headphone port on the Mac Pro. One thing I need to tinker with further is my second speaker, so that I can have nice left/right sound on the Win10 side, as I do on the Mac OS side of the computer - the tricky part on Win10 is that when two blutooth speakers are wired to the computer, at least on my end - only one is recognized as wired, and the other as blutooth only, even though it's wired too - so I have to fidget-around with wired/blutooth mixed setups in one of the third-party sound programs I'm using in Win10. Mac OS has that "Audio MIDI Setup" control panel that makes it easy to "subdue"
both blutooth speakers into wired mode, simultaneously.
Happy flying all,