This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs "Allegro in D Major Wq. 116-25 (H. 251)" is a work that showcases his unique expressiveness. This piece progresses with a bright and lively tempo, filled with energy that captivates the listener. Bach employs unpredictable rhythmic changes and bold harmonic progressions to offer surprise and freshness to the audience. Notably, the intricate interplay between the right handʼs brilliant passages and the left handʼs powerful accompaniment provides the music with a rich texture. The improvisational elements often found in his works also play a crucial role in this Allegro, allowing performers the freedom for expressive interpretation. Overall, it is a piece that encapsulates Bachʼs innovative spirit and emotional diversity.