This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Composed in 1943, Emanuel Bachʼs Sonata in A Major Wq. 65-10 (H. 19) is one of the most captivating pieces among his keyboard works. This sonata, while influenced by his father Johann Sebastian Bach, possesses a unique expressiveness. The first movement has a lively and bright atmosphere, showcasing Emanuel Bachʼs characteristic emotional expression. The following second movement is notable for its calm and introspective melody, leaving a deep impression on the listener. The final third movement is a vibrant finale, filled with technical passages that challenge the performerʼs skill. This sonata demonstrates Emanuel Bachʼs innovation during the transition to the Classical period and highlights the influence his music had on later composers.