If you just needed an acapella, you would likely be forced to brave a variety of dodgy forums and torrent sites to find the vocal you were looking for. Once upon a time, if you wanted to remix a tune you needed stems supplied by the original producer to do it properly. Want to isolate a vocal track? Want to remove the drums? We review four of the best stem separation tools and focus on which is the best for DJs and live remix performances.
