How to remove vocal from audio songs?  

Frontvisions should have said that, on his website, you need to click 'Cool Stuff'. On that page there is a nice little audiovisual tutorial on removing the vocals from an audio track. The technique will only work, though, if you have a stereo track to work with. While the AV tutorial is impressive, you should be aware that some tracks will work better than others: it depends on how well the vocal part of the track is 'centered' in the stereo image (most solo vocals are placed in the center of the stereo 'stage' so that there is equal amplitude of the vocal from each speaker).

Thanks owl.