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. 2 in A-flat major, Wq. 49-2 (H. 31), is one of the sonatas dedicated to Duke Carl Eugen of Württemberg in 1744. This piece is captivating with its soft and elegant tonality in A-flat major. The first movement progresses at a gentle pace in sonata form, characterized by its approachable melody and sophisticated harmony. The second movement is a slow movement requiring deep emotional expression, where ornamentation and the silence between notes embody the essence of the empfindsamer Stil. The third movement is a lively and spirited finale, featuring dance-like rhythms and technical passages that conclude the entire work. This sonata is highly regarded as a representative example of Emanuel Bachʼs keyboard music, where formal perfection and emotional richness are harmoniously balanced. When performed on the clavichord, harpsichord, or fortepiano, the nuances of the music from that era are conveyed more vividly.