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 F Major Wq. 65-19 (H. 49) is one of the particularly captivating works among his keyboard music. This sonata consists of three movements, each possessing a distinct character and tempo. The first movement is characterized by a lively and energetic start, with a powerful rhythm that immediately draws in the audience. The following second movement is notable for its calm and graceful melody, requiring rich emotional expression. The final third movement is a light and dance-like finale incorporating the rhythm of a polonaise, bringing the entire piece to a brilliant close. This sonata is an excellent example of Emanuel Bachʼs innovative style and his role as a bridge to classical music. His works evoke the evolution of music during the transition from the Baroque to the Classical period, and this sonata, in particular, embodies its diversity and expressive richness.