These Sonatas for flute and harpsichord obbligato (Wq 83 - 86) were written in Potsdam between 1745 and 1755, while C. P. E. Bach was in the service of King Frederick II of Prussia. The sonatas also exist in genuine trio Sonata versions. In our present version, the right hand of the harpsichordist takes over one of the concertante parts. Only when this part rests does the harpsichord fulfill the function of a thoroughbass. This edition was based an the autograph and an copies by Westphal, a friend of the composer. The score reproduces the Urtext, thus maintaining the characteristic features of C. P. E. Bach's writing. The articulation suggestions added by the editor in the flute part haue been distinguished by broken lines.