The way most songs are produced, the vocals are another "level" than the music itself, so the program picks up on that, and can take the vocals off. As for rough demo's such as CITR, and it goes the same for just about all live material ive run through this program, it just doenst pick up on it.
what about the cleaned up catcher verison called "catcher dehissed" ? that doesnt sound rough so can you do it with the clearer sounding catcher dehissed version?