About Wolfgang Amadeus Mozart's Sonatas for four hands
Mozart’s early sonatas for piano four hands were written during the early 1770s to be performed by the composer himself and his sister Nannerl, who was considered as accomplished a performer as her brother – there is a famous portrait showing the two seated at the same piano.
After Mozart left Salzburg for Vienna his production of duo sonatas stopped, as he didn’t have his sister at hand.
However, in 1786-1787 he wrote another two, K. 497 & K. 521. The tender modesty and charm of his youthful music is replaced here by a mature and brilliant elegance.