Listen to Keyboard Concerto No. 4 in A Major, BWV 1055: I. Allegro online. Keyboard Concerto No. 4 in A Major, BWV 1055: I. Allegro is an Instrumental language song and is sung by Tatiana Nikolayeva, Saulius Sondeckis and Lithuanian Chamber Orchestra. Keyboard Concerto No. 4 in A Major, BWV 1055: I. Allegro, from the album Bach: Twelve Keyboard Concertos (Live), was released in the year 1976. The duration of the song is 4:22. Download Instrumental songs online from JioSaavn.