Listen to Mazurka Op.7 No.4 in a Flat Major online. Mazurka Op.7 No.4 in a Flat Major is an Instrumental language song and is sung by Classic Factory. Mazurka Op.7 No.4 in a Flat Major, from the album Children's Classics, was released in the year 2019. The duration of the song is 0:59. Download Instrumental songs online from JioSaavn.