http://tinyurl.com/cd8bdrt

Music software download | Make beats on MAC or PC
Dr. Drum goes a step beyond other beat makers by using professional quality, real tracks, not MP3s to produce the sounds you use to make your own beats. The program is easy to use, but produces complicated results. This isn’t a lightweight program, but you won’t have to be a rocket scientist, or even a professional musician to produce great tracks.

http://tinyurl.com/cd8bdrt