This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Solfeggio in A Major (Wq. 117-4) is a short keyboard piece characterized by its bright and light-hearted nature. The key of A major imparts a sense of openness and accessibility to the piece. It showcases the empfindsamer Stil, with its simple yet lyrical melodies and delicate harmonic progressions. The concise structure of the piece makes it approachable for beginners, while performers are expected to deliver a lively and expressive rendition. It is cherished as a learning piece, yet its high musical quality ensures it is enjoyable for audiences as well.