Listen to Concerto for Organ In D Major, RV 124: I. Allegro online. Concerto for Organ In D Major, RV 124: I. Allegro is an Italian language song and is sung by Anton Nanut and Zagreb Soloists. Concerto for Organ In D Major, RV 124: I. Allegro, from the album 50 Most Essential Vivaldi, was released in the year 2010. The duration of the song is 2:15. Download Italian songs online from JioSaavn.