When I was at work, we made some music in a program and now i'm desperate to find the name. The system we used was Mac OS X Snow Leopard 10.6.x. The program contained a lot of Royalty Free music, and you could change the style (E.G. this one with "Frost" in it's name had a cold "mood" and "frosty" mood, etc.) and you could change which parts were heard (E.G. you could set it drums only, or background) and then from there you would drag it onto the track, and you could edit it's length and it would match the length you made it. Also, when you started the program it played a guitar chord.