Q2 Music celebrates America’s great iconoclastic composers when San Francisco Symphony music director Michael Tilson Thomas brings his “American Mavericks” tour to New York. In anticipation of their Carnegie Hall concerts, composer John Adams and Meredith Monk, the St. Lawrence String Quartet, pianist Jeremy Denk, and other guests joined Tilson Thomas for an evening of performance and conversation around the music of Charles Ives, John Adams and other maverick composers. WQXR’s David Garland and Q2 Music’s Nadia Sirota hosted.