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. 118/4 "Arioso and Seven Variations" is a work particularly rich in emotional expression among his keyboard compositions. This piece features a gentle, song-like arioso as its theme, upon which seven variations are developed.
The arioso theme exemplifies the characteristics of the Empfindsamer Stil (sensitive style), imbued with lyrical and profound emotion. Each variation introduces subtle changes in melody and rhythm, with increasing ornamental elements and technical passages, allowing the music to develop dramatically.
The ingenuity in harmony and the diversity of rhythm are particularly striking, requiring performers to have flexible interpretation and advanced technique. Throughout the piece, Emanuel Bachʼs creativity and musical depth are palpable, leaving a strong impression on the audience. This work serves as a captivating example of keyboard music bridging the Baroque and Classical periods, highlighting Emanuel Bachʼs significant position.