--- In logic-users@yahoogroups.com, <christianobermaier@y...> wrote: > > Any ideas Christian on how they did the 'Nat King Cole' and Natalie Cole > > track together > > all those years ago now ............ > > There's a technique to *remove* vocals and everything else that's in the > center of a stereo recording, involving phase reversing of one side and then > summing both channels to mono (your mixer does the math), but you can't > apply it backwards to remove everything but the vocals. ...Although theoretically if you had a perfect file of the vocal- free backing track and you phase-subtracted it from the original you would end up with only the removed vocal... Sonny Keyes SKa Music Toronto