Individual, isloated Sgt Peppers vocal and instrumental tracks

In this little youtube (posted by Beatlepuzzle), the instrumental and vocal tracks off the Beatles' Sgt. Pepper's Lonely Hearts Club Band are each played individually, having been carefully extracted and polished for your remixing pleasure. The tracks are so well-isolated that I thought it might be a fake, but it's a damned good one if so — there are little spots where you can barely hear the nearly silent other instruments and so on.