This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Württemberg Sonata No. 3 in E minor, Wq. 49-3 (H. 33), is a particularly expressive work from the collection of sonatas dedicated to Duke Carl Eugen of Württemberg in 1744. The key of E minor imparts a sense of shadow and drama throughout the piece. The first movement is in sonata form with tension and contrapuntal structure, marked by the powerful development of its themes. The second movement is characterized by a meditative and emotionally appealing melody, exemplifying the core of the empfindsamer Stil (sensitive style). In this movement, delicate ornamentation and subtle harmonic changes are especially prominent. The third movement is lively and spirited, combining dance-like rhythms with virtuosic elements. This sonata is a work that balances formal beauty with emotional expression, and its nuances are particularly highlighted when performed on the [clavichord,] harpsichord, or fortepiano. It is regarded as one of the most emotional and refined works in Emanuel Bachʼs keyboard music.