Audiences raved about pianist Michelle Cann’s Festival debut in 2023; now Cann returns to Chautauqua to perform the world premiere of a piano concerto by esteemed composer Valerie Coleman. After intermission, Berlioz invites us on a psychedelic romp: his Symphonie Fantastique is a musical hallucination that evokes dark revels, an execution, and a visit to the underworld.