Wilhelm Friedemann Bach, Johann Sebastian’s eldest son, enjoyed a reputation as one of Germany’s finest organists, but his career was one of mixed fortunes and he died in poverty. The dating of his Six Duets is the subject of speculation, but their level of technical sophistication is quite remarkable. Each instrument is given equal status in music that is full of the kind of joyous brilliance, passion and free-mindedness of spirit that transcends virtuosity and the stylistic boundaries of W.F. Bach’s period.