I'm looking for something like JamStudio, it used to be free so far, and in my taste not good enough for a paid service. I also found uJam to be pretty neat, but it's not really suited for jamming. ...
As far as I understand, at Amazon music cloud for 30 dollars a year you can upload all your mp3 music that you have. Even if you never payed for some of the mp3s, after those uploads, they are ...