Listen to Twelve Pieces of Medium Difficulty, Op. 40: IV. Mazurka in C Major online. Twelve Pieces of Medium Difficulty, Op. 40: IV. Mazurka in C Major is an English language song and is sung by Moonlight Sonata and Musica Relajante Oasis. Twelve Pieces of Medium Difficulty, Op. 40: IV. Mazurka in C Major, from the album Classic Relaxation – Anti Stress Music, Instrumental Sounds to Rest, Best Composers After Work, Mozart, Bach, was released in the year 2017. The duration of the song is 2:50. Download English songs online from JioSaavn.