Listen to Mozart: Divertimento for Strings in B-Flat Major, K. 137: I. Andante online. Mozart: Divertimento for Strings in B-Flat Major, K. 137: I. Andante is an English language song and is sung by Academy Of St Martin In The Fields and Sir Neville Marriner. Mozart: Divertimento for Strings in B-Flat Major, K. 137: I. Andante, from the album 101 Relaxing Classics, was released in the year 2013. The duration of the song is 4:53. Download English songs online from JioSaavn.