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 Allegro in E-flat Major Wq. 116-55 (H. 329) is a work that stands out for its emotional diversity within his keyboard music. The piece begins with a bright and lively introduction, characterized by a compelling rhythm that draws the listener in. The melody unfolds fluidly, with occasional unexpected modulations and dynamic changes that surprise the audience. The improvisational elements in Bachʼs music are palpable, offering performers a wide range of expressive possibilities. The depth and complexity of emotion common to his works are vividly reflected in this Allegro.