by Foxtrot89 » 24 Jul 2012 15:55
Correct me if I'm wrong, but there is a difference between HQ and 5.1 surround, which is what's required for the acapella tracks. From what I understand, the vocals and a few of the sound effects are panned dead center, while the rest of everything else is panned to the sides to some degree. If you solo out the center channel, then you get the the vocal track. (and a few sound effects sometimes) I believe it's something along those lines, but I could be wrong.
Basically, though, you won't get a clean rip of the vocals until the 5.1 surround version is released. If I'm not mistaken, the HQ in which you refer to is likely just a non/less compressed mp3/wav or something thereabouts. It's likely just a stereo file, thus the method used for extracting acapellas, if I didn't just make this method up, wouldn't work.
edit: I COULD just be talking out of my ass. Just an FYI, but I never really looked into how you extract the acapellas, just that it involves the 5.1 surround file and random cramming of puzzle pieces together. I could have crammed the puzzle together way wrong.