Listen to Letter Duet, ("canzonetta Sullaria"), Marriage Of Figaro, K.492 online. Letter Duet, ("canzonetta Sullaria"), Marriage Of Figaro, K.492 is an English language song and is sung by Classical Kids. Letter Duet, ("canzonetta Sullaria"), Marriage Of Figaro, K.492, from the album Mozart's Magnificent Voyage, was released in the year 2010. The duration of the song is 2:28. Download English songs online from JioSaavn.