This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs "Alla Polacca in G Minor Wq. 112-11 (H. 168)" is a work that stands out for its wide range of emotions within his keyboard music. While based on the rhythm of a polonaise, this piece utilizes the nuances of G minor to convey deep expressiveness. From the outset, a tense melody unfolds, drawing the listener in with its compelling force. In the middle section, contrastingly gentle passages appear, skillfully depicting shifts in emotion. Bachʼs unique ornamentation and rhythmic variations imbue the entire piece with rich expression. Towards the end, the tension rises again, leading to a dramatic climax. This work allows one to fully appreciate Emanuel Bachʼs compositional techniques and the richness of his emotional expression.