Interview with New Yorker music critic Alex Ross about, among other things, his upcoming book on 20th century music. "Why, when paintings of Picasso and Jackson Pollock go for a hundred million dollars or more on the art market and lines from T. S. Eliot are quoted on the yearbook pages of alienated teenagers across the land, is twentieth-century classical music still considered obscure and difficult? In fact, it's better known than most people realize. Post-1900 music is all over Hollywood soundtracks, modern jazz, alternative rock."