This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Rondo in C Minor Wq. 59-04 (H. 283) stands out among his keyboard works for its profound emotional depth and expressiveness. This rondo reflects the musical transition from the Baroque to the Classical period, characterized by dramatic contrasts and rich emotional expression. The opening theme begins with a powerful yet melancholic melody that captivates the listener. In the middle section, a more tranquil and introspective atmosphere prevails, with tension and release skillfully interwoven throughout the piece. Bachʼs unique harmonic progressions and rhythmic variations lend the work its distinctive charm.