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. 65-23 (H. 57) is one of his most emotionally rich and expressive works among his keyboard music. This sonata, while influenced by his father Johann Sebastian Bach, possesses a unique style that marks the transition to the Classical period. The first movement is light yet introspective, captivating the listener with its charm. The following second movement is characterized by a serene melody filled with deep emotion, showcasing Bachʼs delicate expressiveness. The final third movement is a lively and energetic finale, where technical skill and emotional intensity are beautifully intertwined. This sonata not only demonstrates Emanuel Bachʼs innovative musical language but also reflects the musical transitions of his era, allowing one to appreciate the diversity and depth of his compositional technique.