This site introduces unknown Emanuel Bach (C. P. E. Bach).
It is said that the Cello Concerto Wq. 171 was arranged to create the Flute Concerto Wq. 167 and the Keyboard Concerto Wq. 28.
Emanuel Bach frequently employed the method of arranging existing keyboard concertos for other instruments, creating new versions that utilized the unique characteristics of different instruments. This was also a strategy to ensure his works could adapt to various performance opportunities.
ChatGPT4o writes as follows (please note that it may not be accurate):Emanuel Bachʼs Keyboard Concerto in B-flat Major Wq. 28 (H. 434) is a work of high formal and substantive quality, with three movements that possess contrasting characters. The first movement, Allegretto, is characterized by a light and elegant atmosphere, with a sophisticated dialogue between the keyboard solo and the orchestra. A clear theme is presented, and decorative passages enliven the entire movement. The second movement, Adagio, is a slow movement where a poetic and emotionally rich melody unfolds, highlighting the beauty of the empfindsamer Stil. The movement is captivating with its harmonic progressions that carry deep introspection and the singing expression of the solo instrument. The third movement, Allegro assai, is a bright and lively finale, dominated by an energetic theme and rhythmic development. Like Bachʼs other keyboard concertos, this concerto is widely loved for its exquisite balance between the soloist and the orchestra, demanding advanced technique from the performer while maintaining an approachable character.