This site introduces unknown composer Emanuel Bach (C. P. E. Bach). This English version was translated from Japanese one by ChatGPT.
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Wq. 118/9 “12 Variations on La Folia” is a brilliant work that creatively elaborates on the traditional “La Folia” melody. “La Folia” is a famous theme used by many composers throughout the history of European music, and Emanuel Bach develops variations on this theme, utilizing the characteristics of the Empfindsamer Stil (sensitive style).
The theme “La Folia” possesses a powerful and solemn atmosphere, and in the subsequent 12 variations, the rhythm, melody, and harmony change diversely. Technical embellishments, rapid passages, and contrasting lyrical expressions appear alternately, bringing dynamic changes to the performance. Notably, the balance between the right handʼs brilliant passages and the left handʼs stable harmonic progression stands out. Additionally, in the latter half of the variations, modulations and dramatic developments are added, heightening the tension of the piece.Performers are required to have advanced technical skills and expressiveness to accurately depict the character of the music, which is rich in variation. Wq. 118/9 is an important repertoire in keyboard music, showcasing Emanuel Bachʼs creativity in breathing new life into a traditional theme.