According to sources close to the action, Trent Reznor is deeply involved in the design of the upcoming Apple/Beats service, while Dr. Dre, who’s working on the N.W.A. movie, is also developing a “special project” for iTunes/Beats. But what role has Zane Lowe been brought in to play in the operation? No matter who's doing the talking, expect the spin to be that curation pushes the best music forward.