This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Solfeggio in C Major Wq. 112-10 (H. 147) is one of the most renowned pieces among his keyboard works. This short piece demands advanced technical skills from the performer and is characterized by flowing passages and rapid scales. The piece has a bright and lively atmosphere, leaving a strong impression on the listener. Through this work, Bach pursued expressiveness that transcended the musical boundaries of his time. The Solfeggio includes improvisational elements and has a structure that allows performers the freedom of interpretation. This piece, where his music theory and practice are beautifully integrated, also influenced later composers.