Enabling CMSS-3D Headphone in Bioshock 1

[MuscularMelvin]

http://steamcommunity.com/sharedfiles/filedetails/?id=1245248756

It's been over 10 years since Bioshock came out, but I finally discovered the secret to getting CMSS-3D working. You see, by default there's something wrong with Bioshock's 7.1 and 5.1 speaker settings that causes it to only output stereo audio in CMSS-3D. Even the few demos I could find of Bioshock with CMSS-3D on have this flat, stereo sound:
https://www.youtube.com/watch?v=PKlGxVU4yIw
I found out that by setting Creative speakers to Headphones, Windows speakers to 7.1, and Bioshock to Quad, you actually can get the full HRTF. Yes, that's right; Quad speakers, not 7.1 surround.

It's still not perfect; enemy sounds don't portray distance that well and some rear sounds like cameras are too quiet. Still, the CMSS-3D in Bioshock 1 is about as good as in Bioshock 2 with these settings. I'd also like to hear results from people with other software like Razer Surround.