This isn't your bog standard Pro Tools package. Developed by Sony, Flow Machines is artificial intelligence software which uses an extensive databse of pop music to make its own compositions. For my general lack of technical insight, I'll let Sony explain...
1) We set up a database called LSDB. It contains about 13000 leadsheet from a lot of different styles and composers (mainly jazz and pop about also a lot of Brazilian, Broadway and other music styles).
2) The human composer (in this case Benoît Carré, but we are experimenting with other musicians as well) selected a style and generated a leadsheet (melody + harmony) with a system called FlowComposer. For Daddy’s Car, Carré selected as style “the Beatles” and for Mr. Shadow he selected a style that we call “American songwriters” (which contains songs by composers like Cole Porter, Gershwin, Duke Ellington, etc).
3) With yet another system called Rechord the human musician matched some audio chunks from audio recordings of other songs to the generated leadsheets.
4) Then the human musician finished the production and mixing.
'The human musician'. An AI album is due out in 2017. The march into mankind's obsolescence never sounded so good ♬♩♫♪☻(●´∀｀●)☻♪♫♩♬