This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonatina in A Minor Wq. 64-3 (H. 9) is one of the works that showcases his unique musical style. This sonatina is rich in emotional shifts and has the power to captivate its listeners. The shadowy atmosphere brought by the A minor key adds depth to the entire piece. While the structure is simple, the clever harmonic progressions and rhythmic changes keep the audience engaged. Particularly, Bachʼs expressively rich melodic lines are impressive, offering performers a wide range of interpretative possibilities. The richness of emotional expression in his music and the sense of innovation during the transition to the Classical period can be felt.