Listen to Prelude No. 21 in B flat, Allegro online. Prelude No. 21 in B flat, Allegro is an Instrumental language song and is sung by Marios Papadopoulos and Oxford Philharmonic Orchestra. Prelude No. 21 in B flat, Allegro, from the album Shostakovich 24 Preludes & Fugues Vol. II: Nos. 13 to 24, Op. 87, was released in the year 2020. The duration of the song is 1:19. Download Instrumental songs online from JioSaavn.