Siciliano Sample  Lesson Sample by J. S. Bach. BWV 1031. Intermediate Level. (Download) This is an extract and arrangement from Sonata for flute and harpsichord by Bach. The lesson begins with a full demonstration of the arrangement followed by a detailed lesson of the piece in two to four measure sections. The song is taught completely by ear using no print or video. This song lesson is also available at a late beginner level.