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 Sonatina in B-flat Major Wq. 63-10 (H. 295) is one of the works that demonstrate his diverse musical style. This sonatina reflects an important transitional period in the development of classical music, evoking the shift from the Baroque to the Classical era. The piece has a lively and bright atmosphere, giving listeners a sense of familiarity. Formally, while it is based on the traditional sonata form, it also showcases Emanuel Bachʼs unique free expression. The improvisational elements and emotionally rich expressions in his music are prominently displayed in this work as well. In particular, the fluidity of the melody line and the changes in rhythm possess an allure that captivates the listener. Emanuel Bachʼs works, while influenced by his father Johann Sebastian Bach, exhibit his own musical exploration, and this sonatina is an example of that.