This site introduces unknown Emanuel Bach (C. P. E. Bach).
C. P. E. Bach Sonata IV in B minor, Wq 63-4 (H. 73)
1st Movement: Allegretto grazioso
2nd Movement: Largo maestoso
3rd Movement: Allegro siciliano e scherzando
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonata in B minor Wq 63-4 (H. 73) is a captivating work that showcases his unique musical style. This sonata consists of three movements, each possessing distinct emotions and character. The first movement is characterized by its graceful and light tempo, inviting the listener into a serene atmosphere. The following second movement expresses solemn and profound emotions, offering a glimpse into Bachʼs inner world. The final third movement is notable for its Sicilian rhythm and playful melody, leading the entire sonata to a lively finale. This work exemplifies Emanuel Bachʼs innovative musical language and his significant role in the development of classical music. His music explored new expressive possibilities during the transition from the Baroque to the Classical period, greatly influencing later composers.
According to the commentary by Darrell M. Berg on Miklós Spányi's CD (BIS-CD-1189) (translated by ChatGPT4o):
Allegretto grazioso - B minor - A movement with intricate and splendid melodic lines and extended dynamics. Despite its lively rhythm and frequent loud sections, it ends quietly.
Largo maestoso - D major - A movement with dotted rhythms, intended to create a traditionally grand and dignified character. It concludes with a large-scale cadenza in a free rhythm style, where the melodies of the right and left hands respond to each other, requiring bebung (vibrato technique) for sustained notes.
Allegro siciliano e scherzando - F-sharp minor - A movement that produces a humorous effect through sudden dynamic changes, rhythmic interruptions, and tense pauses.