been down that road man...there are machines that are advertised as being able to do it, but the low-down from others is that they aren't very good either...better than a karaoke machine, but still not what I was looking for...here's one of my tricks I don't share much, but you can make an instrumental out of a track if you can find parts in the song with no vocals...you can loop those parts and then arrange them the way you like to make chorus, verse, intro, etc. You can string those parts together to make you own instrumental.... I have better luck with that now days (though in rap, cats rarely shut the f up long enough for me to steal parts to loop, lol)
