Guest conductor and harpsichordist Jeannette Sorrell, founder and director of Cleveland's acclaimed Apollo's Fire baroque orchestra, talks with Jim Cunningham about her approach to Bach's Six Brandenburg Concertos for her Pittsburgh Symphony debut. She talks about tempos, textures and solos - especially the florid harpsichord cadenza in the fifth concerto, and the great conductors she studied with including Bernstein, Norrington, and Leonhardt.