This week, we're talking with George Stelluto, Music Director of the Peoria Symphony Orchestra. The PSO is presenting Gustav Mahler Symphony no. 7 this weekend -- the first time the orchestra has performed that work. Stelluto describes the symphony as a "journey from darkness to light," and talks about some of the additional instruments that the score calls for. He also puts the symphony in the context of Mahler's own life. The concert is Saturday night at 8:00 at the Peoria Civic Center Theatre.