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 B minor Wq. 143 (H. 567) is a work that stands out for its wide range of emotions and expressiveness within his keyboard music. This sonata leaves a strong impression on the listener through its unpredictable modulations and rhythmic changes. From the outset, a sense of tension pervades, with melodies that evoke inner conflict and anxiety. The middle section unfolds a calm and meditative atmosphere, providing a vivid contrast. In the final movement, intense emotions are once again expressed, with dynamic developments continuing throughout. The innovative compositional techniques of Emanuel Bach are evident throughout, reflecting his musical curiosity and exploration.