After the dramatic send-off of his music into space aboard Voyager II, Mr. Bach, along with his magic orchestra and choir, drops in on a little girl as she practices the piano. Over two dozen excerpts, including Jesu Joy of Man’s Desiring, Brandenburg Concerto #5, Flute Sonata and Badinerie, Air for the G-string, Goldberg Variations, piano minuets and preludes, organ music and Choral Cantata #78.