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. 51-4 (H. 128) is one of the works that showcases his unique musical style. This sonata, while influenced by his father Johann Sebastian Bach, contains elements that suggest a transition to the Classical era. The first movement is characterized by a powerful and passionate melody, full of energy that captivates the audience. The second movement exudes deep emotion and an introspective atmosphere, offering a glimpse into Bachʼs expressive side. The final third movement is a lively and spirited finale, highlighting technical skill and rhythmic movement. Throughout the entire sonata, one can feel Emanuel Bachʼs innovative musical language and the influence he had on the music of the following era.