During the water fountain test, i found sbx at 100% to be fine, but not the best.. At 30% im not quite sure why anyone who wants virtual surround would even use that as it has barely any good direction and you might as well use stereo more accurately lol. The uploader only used the most extremes of SBX surround and in doing so does an injustice by not representing what it is capable of. Its possible they were intent on being biased from the get go, who knows.
100%, while broadening the soundstage the most, it also lessens the accuracy of the soundstage. I already posted my findings and what I mean by this, I will post it again. But in short, 67% is the all around clear winner in my opinion and the reason why its the default.
I posted this here and on overclock.net a few times already,
"So I did some more analytical testing with the sbx surround slider. I have come to one conclusion and setting to rule them all lol, 67%.
Edited by DJINFERNO806 - 12/15/13 at 1:45am
The reason is I find its the best compromise of accuracy and surround immersion.
The higher I go towards 100% the less accurate the sound stage begins to be. Let me try and explain.
So if a sound came from my rear right at lets say coordinates (10,10). At 67% I can hear that its at (10,10) but at 100% I can only tell its in between my rear right and my absolute right, or (5 to 10, 5 to 10).
Another explanation is the channels start to bleed together. Lower than 67% you lose immersion and the channels start to close off and you begin to get a straight stereo effect without any hrtf.
Hope that makes sense.
For me accuracy is more important so that's why I pick this. Also I felt like it muffled or exaggerated sounds at distances when set towards 100%(as has been mentioned by xshollywood as well before) Hard to explain this one but maybe it messes with the volume and eq of some sounds.
67% seems best at emulating a properly calibrated and eq'd 5.1 home theatre(I use mine in comparison). Seems reasonable that creative would use this as default.
As always whatever sounds best to you is the best choice."