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 C Major Wq. 116-53 (H. 327) is a work that stands out for its emotional diversity within his keyboard music. Composed in a bright and lively C major, this piece conveys joy and energy to the listener. From the outset, a powerful theme is presented, followed by sections that develop with clever counterpoint and rhythmic variations. Bach skillfully employs changes in dynamics and tempo to alternate between tension and release in the music. The piece includes ornamental notes and improvisational elements, offering performers room for expressive freedom. Throughout, it is a work that showcases Bachʼs creativity and technical prowess, embodying the emotional depth of his music.