This site introduces unknown composer Emanuel Bach (C. P. E. Bach). This English version was translated from Japanese one by ChatGPT.
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Fantasia in G minor (Wq. 117-13) is a work characterized by deep emotional expression and dramatic development. The key of G minor creates a melancholic and introspective atmosphere, strongly reflecting the traits of the empfindsamer Stil. The piece is notable for its free form and improvisational elements, with harmonic changes and rhythmic diversity adding to its unique charm. Despite its brevity, it is rich in expression, requiring performers to convey subtle emotional nuances. This dramatic and poetic piece captivates audiences.