For binaural or what ever virtual surround I suggest razer software, it's very good. My honest advise though is quality open back cans with a good amp and you have all the surround you need, sublime sound stage and epic separation makes 5.1 moot. I have Akg Q701 and use them for everything.
Nothing questionable in binaural sound.
How it (actually human hearing) works has been thoroughly studied decades ago.
Heck, principle of how to record sound in 3D like human hears it with two channels was invented over 130 years ago.
https://www.theverge.com/2015/2/12/...ural-immersive-vr-sound-times-square-new-york
And as headphones completely bypass how sounds from any direction reach both ears in real world without that taken into account in signal itself result isn't good:
Stereo signal mixed purely for speaker becomes
very artificial with lots of "left ear" or "right ear" sound no matter the headphones.
Some mixing of L/R channels together/"crossfeed" removes artificial feeling, but any separation still stays limited to left and right axis.
Binaural sound is needed to expand separation to y and z axis.
Headphone quality/soundstage then limits how much separation of directions/depth can be felt.
With bad ones it's the size of bucket on head and everything sounds like coming from directly "front" of ears with no sense of depth.
And haven't yet found any recorded Razer Surround material which would make it anyhow special.
It messes frequency response seriously like CMSS-3D, but lacks all of its accuracy/depth.
Wouldn't wonder if it's tweaked for trying to cover flaws of those cheap Chinese bling bling headphones Razer puts big price sticker on...
Razer Surround vs X-Fi: CMSS-3D, Skyrim
Razer Surround 7.1 vs Creative SBX Pro Studio BF 4
Battlefield 4 with different soundcards and onboard
And while binaural-simulation would work best (especially height separation) from game's original raw sound data with sound samples and sound source locations in acoustical model of game environment that just doesn't happen really.
Sound aspect is clearly made for the "lowest common denomitor" in most games and without hardware acceleration sound cards get only sound already processed and flattened to discrete channels.
You can thank Microsoft for killing DirectSound3D in Vista...
Likely to make PC look not so much more advanced than consoles.