So I recently ordered a MBP and can't wait to get it One thing I would like to learn and play around with is some music mixing. Like making techno/party music from hip hop songs and stuff like that. So basically adding beats during the songs, speeding up, slowing down, reapeating certain parts more then other parts...Nothing to advanced I guess... What software would be good for that? I would prefer something free or maybe already included with the MBP. Thanks!