Learning Exercise

Well-Tempered Clavier: Module 21

Listening and reading exercise on fugue 21 (B-flat major) of JS Bach's Well-Tempered Clavier in performance by Edward Parmentier on the harpsichord. Includes online assessment.


"Bach to School" is open-content curriculum that threads its way through four summative works of J. S. Bach.  Designed... see more


  1. Listen to the B-flat major fugue at:
  2. Read the narrative, at the end of which you'll find a link to the online assessment. The narrative is available in English and Spanish.


  • Topics: permutation fugue, countersubject, pattern & metapattern 
  • Key concepts: Contrapuntal texture with two countersubjects inverted in a pattern with one anomaly; rotation of polyphonic voices; fugue likened to Amish quilt, poetry, and folk art.
  • David Korevaar's performance notes included at:


  1. Answer the ten questions at:
  2. Enter your name and instructor's email at the top of the page, then click the "Send to Instructor" button.