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 Wq. 116-30 (H. 304) is a work that stands out for its wide range of emotions and expressiveness within his keyboard music. This sonata surprises the listener through its unpredictable modulations and rhythmic changes. In particular, the contrast between rapid passages and slower sections adds depth to the music. Bach skillfully uses ornamentation and improvisational elements to encourage performers to interpret the piece freely. This work possesses an innovative quality that transcends the boundaries of the Classical era, reflecting his musical curiosity and exploration.