This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs **Fugue in A Minor, Wq. 119-1 (H. 76)** is a profound and tense work that employs contrapuntal techniques. While inheriting the strict counterpoint of his father, Johann Sebastian Bach, Emanuel Bach incorporates his own empfindsamer Stil, resulting in a richly expressive piece. The theme is presented with the shadow and tension characteristic of a minor key, and it unfolds into increasingly complex polyphony. The voices intertwine delicately, marked by meticulous structure and dramatic expression. In the middle section, the theme is treated with variations, skillfully incorporating modulations and counter-melodies. This adds a rich movement and inner depth to the entire composition. In the conclusion, the powerful recapitulation and harmonic fullness provide cohesion to the piece while maintaining its tension. The contrast between the shadow of the minor key and the intricate structure leaves a deep impression on the listener. This fugue is one of the most accomplished among Bachʼs keyboard works, showcasing his exploration of counterpoint and the fusion of empfindsamer Stil.