The 120 musicians of the Stanford Symphony Orchestra rehearse at Bing Concert Hall for a performance of Mahler's Symphony No. 6 in A minor, “Tragic." The 90-minute epic transports performers and audience members through Mahler's world of poetic landscape, sinister visions and profound love. Directed by Jindong Cai, the orchestra features a number of unique instruments, including a handcrafted hammer box that delivers huge, booming percussion.