Ok, another example. This song:
You dropped a bomb on me – Gap band
This is of course the original 13 minute version. There is one unique aspect to the song which makes it easy to rip the vocals: The whole song is based around the same beat and bassline, so it is possible to overlay those same 16 bars throughout the entire song to make a template to bounce out the vocals.
Tricky part: The drum rhythm is played by a human, not a drum machine, so it is not exact. Therefore, when using acid’s beatmapper to overlay the 16 bar riff, the tempo must constantly be corrected in the original song at every interval to make both parts match up as closely as possible.
Then, once this is one, hard pan each track left and right, render a wav, put it into Nero Wav editor and slap the Karaoke filter on it. I did about 40% pan on the vocal and it got a nice result. There is some noise still in there, its not perfect, but the vocals are clear while the bass is nonexistent and the drums are de-emphasized.
This one (with luck) should also be in the downloads within about a week, pending approval by the acapellas4u mods.
EDIT: Having some probs, seems the system doesn’t like me uploading 20mb mp3 files …