Wolfgang Amadeus Mozart (1756-1791) 1/5. Donald Macleod opens Mozart's address book to discover the friends, family and fellow musicians who inspired some of his greatest music. These include a piano sonata written to perform with Mozart's sister Nannerl, and a horn concerto for his virtuoso friend Joseph Leutgeb. Sonata for 4 hands, K381 Martha Argerich, Alexandre Rabinovitch (piano) Die Schuldigkeit Des Ersten Gebots (excerpts) Margaret Marshall, Ann Murray (soprano) Hans Peter Blochwitz (tenor) Radio-Sinfonieorchester Stuttgart Neville Marriner (conductor) Horn Concerto, K417 Barry Tuckwell (horn) English Chamber Orchestra Ah, lo Previdi! Emma Kirkby (soprano) The Academy of Ancient Music Christopher Hogwood (conductor).