Piano concertos by Wolfgang Amadeus Mozart it was probably J.C. Bach, whom Mozart admired, who introduced the structural innovation of allowing the keyboard to introduce new thematic material in its first entry. Concertos Nos 1–4 (K. 37, 39, 40 and 41) are orchestral and keyboard arrangements of sonata movements by other composers. The next three concertos (K. 107/1, 2 and 3), which are not numbered, are arrangements of piano sonatas by J.C. Bach (Op 5. Nos. 2, 3, and 4, all composed by 1766). Based on handwriting analysis of the autographs they are believed to date from 1771–72. Concerto No. 5, K. 175 from 1773 was
Organ concertos, Op. 7 (Handel) ornamentation supplied by Smith and have been recorded by Erato. Two modern performing editions of the concertos by the organists and musicologists Peter Williams and Ton Koopman provide missing movements and give suggestions for the ad libitum passages, possibly too earthbound according to some commentators. The recordings of the organists George Malcolm (1976) and Richard Egarr (2009) give further possibilities, which have so far not appeared in printed editions. Organ concertos, Op. 7 (Handel) The Handel organ concertos Op 7, HWV 306–311, refer to the six organ concertos for organ and orchestra composed by George Frideric Handel in London between