Listen to Instruments of the Orchestra: Vivaldi: Concerto in C for two trumpets, RV 537: I. Allegro online. Instruments of the Orchestra: Vivaldi: Concerto in C for two trumpets, RV 537: I. Allegro is an English language song and is sung by Jeremy Siepmann. Instruments of the Orchestra: Vivaldi: Concerto in C for two trumpets, RV 537: I. Allegro, from the album Instruments of the Orchestra (The), was released in the year 2002. The duration of the song is 2:54. Download English songs online from JioSaavn.