Listen to String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: II. Adagio ma non troppo online. String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: II. Adagio ma non troppo is an Unknown language song and is sung by Juilliard String Quartet. String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: II. Adagio ma non troppo, from the album Beethoven: The Early String Quartets, Nos. 1-6, was released in the year 2009. The duration of the song is 7:55. Download Unknown songs online from JioSaavn.