Welcome to this digital edition of Phillip Huscher's Program Notes for upcoming concerts by the CSO Oct 24-26. A captivating program of music by Vivaldi, Mozart and Piazzolla features the CSO conducting debut of Julian Rachlin, a violinist of "brilliant high-octane technique" (The New York Times). Rachlin conducts and performs on two vastly different incarnations of The Four Seasons—Vivaldi’s pictorial baroque masterpiece and Piazzolla's tango-inspired take.