I am referring to extractions like these:
- http://www.youtube.com/watch?v=yLKFSmI-iYM
- http://www.youtube.com/watch?v=oyx14aFNPX0
- http://www.youtube.com/watch?v=Xm7w5al2n7o
- http://www.youtube.com/watch?v=rfNGRpHnbck
The quality is, quite frankly, amazing. One could remix the song starting from the tracks.
All of these seem to be extracted from the final mix. How is this done? Using what tool and how does that tool operate?