515 days ago- Most composers reach into the past or use the stuff of legends, but not John C. Adams. The Berkeley composer has virtually invented “documentary classical music,” on the order of the operas “Nixon in China” and “The Death of Klinghoffer,” a musical about the aftermath of the 1994 Los Angeles earthquake, and his Pulitzer-winning “On the Transmigration of Souls,” commemorating Sept. 11, 2001.