This site introduces unknown Emanuel Bach (C. P. E. Bach).
C. P. E. Bach Sonata in E-flat Major Wq. 65/28 (H. 78)
1st Movement: Allegretto
2nd Movement: Andante
3rd Movement: Allegro
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonata in E-flat Major Wq. 65/28 (H. 78) is one of the particularly captivating works among his keyboard music. This sonata showcases his unique style and rich emotional expression. The first movement has a lively and bright atmosphere, drawing listeners in with its charm. The following second movement possesses a calm and introspective character, expressing deep emotions. The final movement, Allegro, is a vibrant and energetic finale, with impressive technical passages. This sonata not only demonstrates Emanuel Bachʼs creativity and technical prowess but also highlights how his music served as a bridge to the Classical period. His works played a significant role during the transition from the Baroque to the Classical era, and this sonata is one such example.
According to the commentary by Darrell M. Berg on Miklós Spányi's CD (BIS-CD-1087) (translated by ChatGPT4o):
"Although this sonata was not published during Bachʼs lifetime, the numerous surviving manuscripts indicate its popularity. The first movement, ʼAllegretto,ʼ unfolds like a dialogue between lively and calm personalities, occasionally interrupted by almost orchestral rapid unison passages. The melody of the second movement, ʼAndante,ʼ initially possesses a song-like quality with poignant syncopations and off-beats, but soon becomes ornamented and expressively characteristic of keyboard instruments. The final movement, ʼAllegro,ʼ is more distinctly orchestral than the first, beginning with a strong unison presentation alternating with decorative passages in the right hand, reminiscent of a concerto."