Minuet in Cm Sample  Lesson Sample from the Notebook for Anna Magdalena compiled by Bach. (Download) Late Beginner Level. BWV Anh 121. This piece was chosen by Bach for the notebook because it served as a study in expression as well as phrasing the beauty of tone.  The lesson starts with a full demonstration followed by a detailed "by ear" lesson breaking the entire song down into two to four measure sections.