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 Major (Wq. 117-11) is a work that exemplifies the empfindsamer Stil, characterized by its free and improvisational elements. The bright key of G major imparts a lively and approachable atmosphere throughout the piece. It is marked by a free development unconstrained by form, with harmonic changes and rhythmic flexibility that possess a unique charm. The piece demands an improvisational performance style, testing the performerʼs expressiveness and technical skill. Despite its brevity, it unfolds a musical world rich in lyricism and creativity.