Listen to J.S. Bach: Concerto in G Major, BWV 973 (after Vivaldi RV 299): 3. Allegro online. J.S. Bach: Concerto in G Major, BWV 973 (after Vivaldi RV 299): 3. Allegro is an Unknown language song and is sung by Ivor Bolton. J.S. Bach: Concerto in G Major, BWV 973 (after Vivaldi RV 299): 3. Allegro, from the album A Classical Aesthetic: Bach, was released in the year 2022. The duration of the song is 2:05. Download Unknown songs online from JioSaavn.