The film is also potent in arguing that the history of race in the 20th-century U.S. is at jazz's heart. But a few problems arise. First is Burns's reliance on Wynton Marsalis as his chief musical commentator. Marsalis might be charming and musically expert, but he's no historian. For the film to devote three of its episodes to the 1930s, one expects a bit more historical substance. Also, Jazz condenses the period of 1961 to the present into one episode, glossing over some of the music's giant steps. Burns has said repeatedly that he didn't know much about jazz when he began this project. So perhaps Jazz, for all its glory, would better be called Jazz: What I've Learned Since I Started Listening (And I Haven't Gotten Much Past 1961). For those who are already passionate about jazz, the film will stoke debate (and some derision, together with some reluctant praise). But for everyone else, it will amaze and entertain and kindle a flame for some of the greatest music ever dreamed. --Andrew Bartlett