This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonata in C Minor Wq. 50-06 (H. 140) is one of the most emotionally expressive works among his keyboard music. This sonata, while influenced by his father Johann Sebastian Bach, possesses its own unique expressiveness. The first movement is often performed as "Allegro Assai," highlighting its tension and dramatic elements. Emanuel Bach excelled at expressing emotional fluctuations through music, and this sonata showcases that skill. His works served as a bridge to classical music, greatly influencing later composers. This sonata also features his innovative use of harmony and rhythm, leaving a profound impression on listeners.