Two wartime poets expressed disillusionment; two composers spun their poems into evocative musical scores. Atlanta Symphony Orchestra Principal Violist Zhenwei Shi stands in for Childe Harold in Berlioz's picturesque Harold in Italy. Robert Spano presents the "fearless" piano virtuoso Conrad Tao in Bernstein's plaintive and sassy symphony "The Age of Anxiety," inspired by W.H. Auden's Pulitzer Prize-winning poem.