In the Mozart Museum in Salzburg, there's a piano by Anton Walter of Vienna. It has two fewer octaves than a modern piano, a device operated by the player's knee to 'dampen' the sound, and a knob ...

Post-marriage, some of Mozart's best started to appear -the Haffner and Linz symphonies and five string quartets, for example. Between 1784 and 1786, he composed nine piano concertos and three of ...