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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.
I guess we'll just have to agree to disagree here. (Sort of like our stances on PC gaming, heh.)
I don't know what it is between us-personal HRTF differences, probably-but for me, the two work roughly equally well for software-mixed games constrained to 7.1 to begin with, just with opposite tonal shifts. (CMSS-3D Headphone emphasizes treble, Dolby Headphone emphasizes bass.)
But when it's getting proper 3D positional audio, and Dolby Headphone is still handicapping itself by downmixing that audio to 7.1 first before applying any HRTF processing, it's no contest to me. DH could win
if it made use of the 3D positional audio information in such games, but it doesn't. Still sounds like 5.1/7.1 when it should sound binaural, like
real life. Quite a missed opportunity for Dolby Labs here, but I do wonder if the HRTF used would even work out if not used to simulate a home theater system specifically.
That's not to say that CMSS-3D Headphone is without its flaws; the hit to sound quality is pretty obvious. But for positioning, it's stellar. Front, rear, high, low, it's all there for me, with enough accuracy that I often call it an aural wallhack and would have reasonable confidence in being able to shoot someone through a wall if given the opportunity.
As for THX TruStudio Surround, it has no sense of distance and less directionality to me. It might impact sound quality a bit less, but positionally, it's utterly inferior to both CMSS-3D Headphone and Dolby Headphone for me. Doesn't matter if I try it via Titanium HD Entertainment Mode or Recon3D USB; it just sounds constrained and flat.
The end result is that I'm going to be recommending X-Fi cards for PC gaming whenever possible
because of CMSS-3D Headphone (and superior DS3D/OAL API support). If push comes to shove, though, you can always turn on Dolby Digital Live and get a Dolby Headphone processor. That's what I do when making my comparisons with the SU-DH1.
Actually...you want to see what PC games were doing in the late 1990s, when the whole 3D gaming craze spread to audio?
Check out these videos with Aureal A3D HRTF processing.
Some people insist it still sounds better than anything Creative's done since, even with CMSS-3D Headphone likely borrowing from acquired Aureal tech as much as Sensaura tech. Quite a shame that Creative basically bankrupted and ate up Aureal with legal fees from lawsuits...gaming audio might be different today if they survived, probably for the better.