This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Polonaise in A Major Wq. 116-42 (H. 316) is one of the works that showcases his unique musical style. This polonaise is characterized by its elegant yet powerful rhythm, maintaining the tradition of the dance while also reflecting his innovative expression. The melody flows smoothly, and the occasional dissonances and unexpected modulations surprise the listener. In this piece, Bach skillfully expresses a diversity of emotions, leaving a profound impression on the audience. The improvisational elements in his music are particularly prominent in this polonaise. Overall, it is a work where Emanuel Bachʼs creativity and technique are beautifully fused.