This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonata in E Major Wq. 56-06 (H. 270) is a work with a unique charm among his keyboard compositions. This sonata consists of two movements, both performed at an Allegretto tempo. The first movement is characterized by a lively and flowing melody, with a brightness that captivates the listener. The following second movement, also Allegretto, continues the atmosphere of the previous movement while offering a deeper expression. The piece skillfully incorporates improvisational elements and emotional shifts, often found in Bachʼs works, making it enjoyable for both performers and audiences. This sonata is a shining example of Bachʼs creativity and technique, showcasing the diversity of his music.