This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonata in A minor Wq. 65-02 (H. 4) is one of the most emotionally rich works among his keyboard music. This sonata, while influenced by his father Johann Sebastian Bach, possesses its own unique expressiveness. The first movement is characterized by a strong rhythm and contrasting melody, drawing listeners in with its energy. The second movement exudes deep emotion and an introspective atmosphere, highlighting Bachʼs delicate expressiveness. The final third movement is lively in tempo, with impressive technical skill and dynamic development. This sonata demonstrates Bachʼs innovation during the transition to the Classical period, reflecting the influence his music had on later composers. Emanuel Bachʼs works are captivating for their wide range of emotions and freedom of expression, and this sonata is a prime example of that.