Concerto in D minor for flute and keyboard (Wq. 22, H 426)

C.P.E. Bach: Concerto for flute in D minor (Wq 22, H 426) is the best-known flute concerto of the composer. The concerto was written during his employment at the court of Friedrich II, the king of Prussia. Since the king played flute, it is assumed that this and other flute concertos were composed in 1747, presumably for the king or his flute teacher Johann Joachim Quantz, who was renown flute teacher, flute maker and the composer at the court in Berlin. Even though the authenticity of this popular flute concerto has been questioned, a comparison for the flute and keyboard versions of this concert shows that the flute version most likely was the original. 

The concerto is considered a pivotal piece in the development of the concerto genre: it reflects the emerging style of the Classical period with its expressive qualities and dramatic elements. The concerto is scored for solo flute, strings, and continuo (usually harpsichord).