Listen to String Quartet No. 16 in E-Flat Major, K. 428: I. Allegro non troppo online. String Quartet No. 16 in E-Flat Major, K. 428: I. Allegro non troppo is an Unknown language song and is sung by Barchet Quartet. String Quartet No. 16 in E-Flat Major, K. 428: I. Allegro non troppo, from the album Mozart: Complete String Quartets, Vol. 4, was released in the year 1960. The duration of the song is 4:42. Download Unknown songs online from JioSaavn.