American-born soprano Barbara Bonney provides the sparkle in this ebullient account of Mozart's gem of a cantata, Exsultate jubilate (K. 165). Harnoncourt and his charges do a lovely job with the orchestral pages of the setting, originally written to accompany the singing of the castrato Venanzio Rauzzini. Equally well done is the youthful C Minor Missa solemnis (K. 139), which in many ways looks forward to the great C Minor Mass (K. 427) and to the operas of Mozart's mature years in Vienna. -Ted Libbey