This site introduces unknown Emanuel Bach (C. P. E. Bach).
C. P. E. Bach Sonata in G Major Wq. 65/26
1st Movement: Allegro
2nd Movement: Andante
3rd Movement: Allegretto
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonata in G Major Wq. 65/26 is one of the particularly captivating works among his keyboard music. This sonata, while influenced by his father Johann Sebastian Bach, possesses a unique style that indicates a transition to the Classical period. The first movement is characterized by lively and bright melodies and rhythmic motion, providing a powerful opening that draws in the audience. The second movement is notable for its calm and emotionally rich melody, creating a reflective atmosphere. The third movement offers a light and flowing finale, bringing the piece to a close. This sonata is a testament to Emanuel Bachʼs innovative expressiveness and reflects the musical transitions of his time.
According to the commentary by Darrell M. Berg on Miklós Spányi's CD (BIS-CD-1189) (translated by ChatGPT4o):
"All three movements of this sonata are written in the same key, a feature often seen in Bachʼs very early sonatas. The first movement ʼAllegroʼ consists of a syncopated theme and a motif of ʼsighsʼ that varies throughout. The second movement ʼAndanteʼ features a smooth and graceful melody, with pairs of repeated notes appearing occasionally. The third movement ʼAllegrettoʼ has the character of a fast minuet."