YMMV indeed...did you ever try these videos on for size?
That's CMSS-3D Headphone at its positional best (CoD2 uses DirectSound3D IIRC, BF2 uses OpenAL, so it's getting proper 3D audio in both cases). It sounds like proper 3D binaural audio to me, not some cheap stereo upmix.
The first vid doesn't work, and the second vid... I'm GLAD the Mixamp is Dolby Headphone. CMSS3D sounds like expanded stereo to me. Even THX Tru Studio presents a better surround effect, IMHO. CMSS3D is marginally better than regular stereo, but if that's as good as it gets, I can't say I'll be recommending it to those that want virtual surround. It sounds like a headphone with expanded stereo, while Dolby Headphone actually sounds like sounds are coming from all around you. I'm actually very disappointed. It definitely does have a clarity in sound effects, but it lacks severely in immersing me in a full soundfield.
I want people to know right now, that my case for virtual surround sounds nothing like CMSS3D. If that is what I heard back when I first got the Mixamp, I'd probably just stick to stereo. I don't see it as much of an improvement. Night and day difference between CMSS3D vs DH, THX Trustudio, and the Headzone. (the last three are more similar than CMSS3D).
That vid reminds me of the old Russian ones I saw that had the DH comparisons. Didn't work for me then, doesn't now.
Edited by Mad Lust Envy - 10/13/12 at 4:53am