Extreme Source Separation
Over on BoingBoing, there's a pointer to this YouTube video that shows Sgt. Pepper broken in to 4 distinct tracks. The source separation
is uncanny - and with anything that appears to be too good to be true, a
bit of skepticism is warranted. This video is not really the
result of source separation - but instead it is from the studio itself -
apparently you can get them from here: Sgt Pepper's Multitracks. Still, it is pretty neat to hear Sgt Pepper broken down into its constituent parts. (also liner notes )