If the facilties of let.s say a Tyros 5 gets a pro arranger to latch on to a style,create the outside tracks then delete the style tracks creating his own, this is still conderered professional arranging..this is what I do..purchasing pro midi files and injecting them in to a 6k keyboard, adding your lead or vocal is total Nonsense. The music industry has hoards of cheats, you make a youtube of your work, it.s snatched by outside countries selling your mp3. The art of music outside a business influence finds so much growth from the gifted individual...Retired at 62....

Alan Russell