Two exhilarating symphonies launch the fall residency of Zell Music Director Designate Klaus Mäkelä. Sibelius’ Seventh Symphony sweeps you along like a mighty river flowing to the sea, joining noble trombone calls with misty, churning string currents. Shostakovich’s Fourth Symphony, written under Stalin’s shadow, shows the composer at his most wild and audacious. Be riveted by this panorama of moods and genres — funeral marches, waltzes, birdsongs and caustic interjections.