[citation needed] The fact that Mozart had a piano with a pedal-board is reported in a letter written by his father, Leopold, who visited his son while he lived in Vienna.

[citation needed][6] The concerto is scored for solo piano, flute, two oboes, two bassoons, two horns, two trumpets, timpani and strings.

[8] The solo piano then introduces a new theme,[2] whose construction is described by Robert Levin as "a masterful balance of expressive and narrative detail".

This lyrical, passionate, tender and romantic melody paints a picture of peace and a sense of harmony between the piano and the orchestra and has also inspired its title 'Romanze'.

The new stormy material is a turbulent, agitated and ominous theme, in the relative key of G minor, which greatly contrasts with the peaceful mood at the starting of the movement.

The final movement, a rondo, begins with the solo piano rippling upward in the home key before the full orchestra replies with a furious section.

A contrasting cheerful melody in F major is ushered in not long after, introduced by the orchestra before the solo piano rounds off the lively theme.

After the cadenza, the mood clears considerably and the piece is now fully sunny in character, as we are now in the parallel key of D major, and the bright happy melody is taken up, this time by the oboes and then winds.

The 1984 feature film Amadeus makes use of the first movement when Mozart is stumbling home after an evening with Emanuel Schikaneder during a night of composing the score of his opera The Magic Flute.