Hi Bernier,

I haven't tried it myself, but something like ISSE might do the trick (and is free).

http://isse.sourceforge.net/

Most dedicated vocal removers will work by cancelling out anything in the center of the mix so don't work with newer songs, but there are a few companies making audio isolation software that uses pattern recognition and (I'm assuming) some form of AI to separate sounds instead.

Prosoniq Isolate and Roland R-Mix could both do this, but neither one appears to be currently available unfortunately.

Thanks
Kent
PG Music