This site introduces unknown Emanuel Bach (C. P. E. Bach).
This piece is an arrangement for solo keyboard of the Sinfonia for orchestra, Wq. 178 (H. 653).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sinfonia in E minor Wq. 122-03 (H. 115) is a work that showcases his unique musical style. This sinfonia is known for its wide range of emotions and expressive music. The first movement is characterized by its tension and energy, drawing the audience in with a powerful development. The following second movement exudes a calm and introspective atmosphere, quietly conveying deep emotions. The final movement once again unfolds with lively music, culminating in a dynamic finale that concludes the piece. This work is an example of Emanuel Bachʼs innovative compositional techniques and his ability to express a diverse range of emotions in music.
For each piece in Wq. 122, explanations are provided in "C. P. E. Bachʼs Posthumous Collection of Keyboard Pieces Wq. 122".