Listen to Concerto No. 6 in A Minor, RV 356 "L'estro armonico": I. Allegro online. Concerto No. 6 in A Minor, RV 356 "L'estro armonico": I. Allegro is an Instrumental language song and is sung by Soloists Of St. Petersburg Chamber Ensemble and Mihail Gantvarg. Concerto No. 6 in A Minor, RV 356 "L'estro armonico": I. Allegro, from the album Favourite Encore Pieces, was released in the year 2017. The duration of the song is 3:35. Download Instrumental songs online from JioSaavn.