The music The first 6 tracks are the Gavotte in A minor with Variations by Jean-Phillipe Rameau. Tracks 7-12 are the English Suite #3 in Gminor by Johann Sebastian Bach. Tracks 13-15 are the Piano Sonata (1948) by Leonard Sarason. The movements are labeled 1) Allegro Moderato, 2) Scherzo and 3) Slow and Espressivo. Some sidelights The harpsichord used was electo-accoustic. It is now extinct, so it might be labeled an historical instrument. It had no soundboard just an amplifier and filters. Leanard Sarason (1925-1998) obtained his degree in Composition at Yale. His advisor was Paul Hindemith. He subsequently migrated to Mathematics which subject he taught at Stanford and the University of Washington.