Something does sound a bit off about Rapture3D's Green HRTF quality wise (positioning is spot-on, as it should be), but here's what I want to see: a demonstration video that cycles through ALL of Rapture3D's HRTFs. There's six of them, and the default seems to be the "Amber" one.
Remember that when I discuss binaural HRTF mixing tech, positioning comes first and foremost for me, and sound quality, while quite important, still remains secondary since game audio samples are rarely of the highest fidelity to begin with. For me, the priority is being able to shoot someone in the face through a wall just by listening to his footsteps. If there's something that can do it more clearly out there, I'm all for it, but I will not accept compromises in DS3D/OAL positioning and EAX compatibility as a trade-off.
Sounds alright in that rear cues are readily apparent and there's a slight semblance of height, but I would have liked a comparison with the usual CMSS-3D Headphone configuration in that same video.
I still don't hear anything different at all between 2-speaker and headphone modes in the X-Fi control panel, other than that CMSS-3D Virtual obviously sounded much worse to my ears since it's meant for stereo speakers in front of my head. Might have worked better with a Stax Sigma, AKG K1000, or Sony PFR-V1, one of those "earspeaker" type of sets.
That doesn't explain your video, though...did you mess with the speaker positioning in the THX setup panel to make their placement 90-degrees off from the head or something?
Also note that I never feel like the sound's congested soundstage-wise with CMSS-3D Headphone set the usual way, but that could also be because of my headphones of choice (Stax SR-Lambda) outdoing even the famed Audio-Technica AD700 in sheer soundstage.
Edit: I found a "STALKER: Call of Pripyat" vid by the same guy, sounded better (game reminds me of Metro 2033, especially the music during the Bloodsucker sequence), but comments pointed out an "underwater" like sound effect, and I can hear what they mean.
