Leonard Slatkin will be both conductor and honoree for the Oct. 25 St. Louis Symphony program, “Slatkin’s Legacy,” celebrating his 80th birthday. The lineup includes Slatkin’s arrangement of D. Scarlatti’s Five Sonatas for orchestral wind ensemble, the U.S. premiere of Voyager 130 by the conductor’s song, Daniel Slatkin, Cindy McTee’s Timepiece, and Tchaikovsky’s Fifth Symphony.