Listen to Concerto for 2 Trumpets and String Orchestra in C Major, RV 537: I. Allegro online. Concerto for 2 Trumpets and String Orchestra in C Major, RV 537: I. Allegro is an English language song and is sung by Heinz Zickler. Concerto for 2 Trumpets and String Orchestra in C Major, RV 537: I. Allegro, from the album 100 Vivaldi Playlist, was released in the year 2014. The duration of the song is 3:07. Download English songs online from JioSaavn.