Johann Sebastian Bach composed the first part of Das Wohltemperierte Klavier in 1722 while he was Kapellmeister to Prince Leopold at the court of Cöthen. The somewhat unusual title is based on the discovery of that time to tune a keyboard not mathematical right but a bit out of tune, causing the fact that every note could be the fundamental tone of a key. Gerhart Drijvers made an arrangement of the Praeludium nr. VIII.