i dunno if anything exists like that, but its not hard. up until the other night i had never beatmatched or DJ'd a day in my life, and got a gig with an hour's time in front of a club, and through down some ill drum n bass and it wasnt hard, if your using serato it also does all the hard work for you too, so really beatmatching strickly by ear is something really worth learning though. thats a good idea though! now make that kind of cd and market it bro!