Listen to Bach: Prelude and Fugue in B-flat minor BWV 867 online. Bach: Prelude and Fugue in B-flat minor BWV 867 is an Unknown language song and is sung by Lullaby & Prenatal Band. Bach: Prelude and Fugue in B-flat minor BWV 867, from the album Bach Music with Guitar for My Baby Lullaby Ver. 2 (Pregnant Woman,Baby Sleep Music,Pregnancy Music), was released in the year 2017. The duration of the song is 6:16. Download Unknown songs online from JioSaavn.