In 1939, just days before he fled Hungary for the United States to escape the imminent threat of war, Béla Bartók completed his Divertimento for Strings. An eminent ethnomusicologist as well as a composer, Bartok used modal tonalities in the classical form familiar to Haydn and Mozart to create a joyful, rustic work of intense, sometimes dark, emotional depth. Arizona State University pianist Miki Aoki debuts with The Phoenix Symphony as soloist in Philip Glass’ charming Tirol Concerto for Piano and Orchestra. Composed in 2000, Glass used Tyrolean folk melodies and modern minimalist gestures as well as snippets from his haunting score for the 1998 film “The Truman Show.” Guest conductor Alejandro Gomez Guillen, director of orchestras at Arizona State University, also leads one movement from Mozart’s ever-popular Eine Kleine Nachtmusik, a masterpiece of classical allure that’s loved for its bright balance and impeccable structure.