Haydn: Piano Sonata in D Major Hob XVI:37Joseph Haydns popular Piano Sonata in D major comes from a group of six sonatas which Haydn had published as a collection by the Viennese publisher Artaria in 1780. The edition was dedicated to the sisters Katharina and Marianna Auenbrugger, two Viennese pianists whom the composer greatly admired: The approval of the Misses von Auenbrugger is most important to me; for their way of playing, and their genuine insight into music the music, equals that of