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 D minor Wq. 69 (H. 53) is a work that showcases his creativity and rich emotional expression. The first movement is marked by a powerful rhythm and contrasting melodies, filled with an energy that captivates the listener. The following second movement exudes a calm and introspective atmosphere, quietly conveying deep emotions. The third movement is characterized by a light and flowing melody, bringing a brightness that releases the tension built throughout the piece. This sonata is a testament to Emanuel Bachʼs diverse emotional expression in music and his timeless innovation.