The Minuet and Trio for piano 4 hands from the Keyboard Sonata in C K.19d is an intermediate level piano duet. It is believed that this work dates from 1765 and was possibly played by Mozart and his sister on a visit to London when more than likely it was played on a harpsichord. The music was only discovered in 1921 and whilst in the past it has been attributed to W.A Mozart the current view is that it was more probably composed by either his older sister Nannerl or his father Leopold. Suffice to say there is much of Mozart's classical musical style in this sonata whichever one of the family composed it. The sonata has some very appealing musical content and as a work, most probably written by a child, it is interesting to play and compare to W.A. Mozart's later and more substantial piano 4 hands music such as the piano Sonata for Piano 4 hands in C K.521. There are several variants in terms of the scores available but the sheet music score and realisation are based on current performance practice. The pattern that the of this music in performance is Minuet AABB Trio AABB followed by a repeat of the Minuet without repeats AB. The video score plays back at a tempo of 112 quarter note beats to the minute. The tempi of the minuet and trio sections are the same. Pianists and keyboard players do need to approach the work with a lightness of touch which is perhaps not suggested in the realisation. All notes need to be clearly articulated but duettists need to remember that the piece is very much about melody and accompaniment and it is the top line which needs to prevail. The music editor is keen to have feedback in respect to the accompaniment particularly in regard to the tempo that has been suggested. The accompaniment downloads available enable players to enjoy an ensemble music experience playing either the Primo or Secondo parts. The Primo part sounds on the one channel of the stereo signal and the Secondo part sounds on the other. Accompaniment 1 plays at 112 plays at quarter note beats (crotchet) to the minute, Accompaniment 2 plays at 120 quarter note beats (crotchet) to the minute at beats to the minute and Accompaniment 3 plays at 126 quarter note beats (crotchet) to the minute. There is a 2 bar count in featuring the sound of a wood block. When performing printing two pages of music onto one side of A4 offers a very practical solution for players.