On a program like Adobe Audition, how would you remove the instruments from a song but leave the voice? Or in other words leave the center channel but get rid of mostly everything else.
i dunno if it's the same, but in audacity it's by splitting the track into two mono channels, then inverting one of them.
I've heard of programs (I can't recall the name sadly) where you can do some sort of panning so the (well lets just say) lead guitar frequencies are on one side, and everything else is on the other. Then remove them that way. Not sure, though...