This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs "Wq. 91" is a collection of works for keyboard and string instruments, showcasing his masterful compositional technique and originality. In this collection, the keyboard functions both as a soloist and as part of the ensemble, creating an interactive and rich musical experience. "Wq. 91" is emblematic of his "sensitive style," characterized by intricate structures, unpredictable harmonic progressions, and profound emotional expression. Each movement incorporates a balanced mix of lyrical slow movements and lively fast movements, demanding high technical skill and expressiveness from the performers. This collection is valued as an example of how Emanuel Bach, while inheriting the tradition of his father, Sebastian Bach, opened new possibilities in keyboard music. It is a precious repertoire that allows one to enjoy the charm of keyboard and chamber music.