MTT ON MUSIC, a fascinating behind-the-scenes documentary, conductor Michael Tilson Thomas takes viewers on a guided tour of one of the towering achievements in classical music, Tchaikovsky's "Symphony No. 4." Thomas, who describes Tchaikovsky as "one of the great melody writers of all time," explores each of the symphony's four movements, providing insightful commentary on the powerful and vibrant emotions conveyed in the composer's music. In addition, he introduces individual members of the San Francisco Symphony, who explain the challenges and joys of the music Tchaikovsky penned for their instruments -- including the violin, oboe, bassoon, piccolo, bass, and timpani.