This site introduces unknown Emanuel Bach (C. P. E. Bach).
The Keyboard Concerto Wq. 39 was arranged from the Oboe Concerto Wq. 164.
ChatGPT4o writes as follows (please note that it may not be accurate):Emanuel Bachʼs Keyboard Concerto in B-flat Major Wq. 39 (H. 465) is a work composed in 1765, characterized by its clear and approachable expression, while also displaying influences of the empfindsamer Stil throughout. The first movement features a gentle and graceful theme, with a close dialogue between the keyboard and orchestra. The soft tempo setting imparts a calm atmosphere overall. The second movement is a slow movement imbued with deep emotion and lyricism, marked by meditative melodies and diverse harmonic changes. In this movement, Bachʼs unique expression of inner emotions is emphasized. The third movement is a lively and cheerful finale, concluding the piece with the bright sound of B-flat major. The technical passages of the solo instrument and the rhythmic accompaniment of the orchestra harmonize exquisitely, captivating the audience. This concerto, while demonstrating the early classical style, strongly conveys Emanuel Bachʼs unique musicality.