My buddy has a few programs that are like final scratch. Ill have to dig out the names but he really wants final scratch. Pretty much in all those type of programs you get 2 or 3 turn tables and you can load and cue up songs for playing. You can have one of the songs play in the left headphone or right headphone just like real turn tables so you can make sure the fade into the next song is tight. also a couple of those programs have built in samplers. You can slow down or speed up any music file to match with each other. Id go with final scratch if you wanna do pro stuff. That DJ Naki uses it I believe.