Listen to Concerto in C Major for Guitar and Orchestra, RV 425: III. Allegro online. Concerto in C Major for Guitar and Orchestra, RV 425: III. Allegro is an English language song and is sung by Boris Björn Bagger. Concerto in C Major for Guitar and Orchestra, RV 425: III. Allegro, from the album The 50 Most Essential Guitar Masterpieces, was released in the year 2011. The duration of the song is 2:24. Download English songs online from JioSaavn.