The Boston Symphony was at the peak of its powers when it engaged the 34-year-old Seiji Ozawa for this 1969 recording of Petrushka, in which the orchestra's then 24-year-old assistant conductor, Michael Tilson Thomas, played the extensive solo piano part. Ozawa, in those years, was capable of striking sparks with any orchestra he faced, and there is a palpable sense of excitement to the Petrushka he uncorks here. The accounts of The Rite of Spring and Fireworks, recorded in 1968 with the Chicago Symphony, are equally dynamic and colorful. BMG's long-awaited 24/96 remastering unleashes the breathtakingly open sound of the original tapes for the first time on CD, and may require a volume cut to preserve peace with the neighbors. --Ted Libbey