Listen to Twelve Pieces of Medium Difficulty, Op. 40: IX. Valse in F-Sharp Minor online. Twelve Pieces of Medium Difficulty, Op. 40: IX. Valse in F-Sharp Minor is an English language song and is sung by Konzentration Musikexperten. Twelve Pieces of Medium Difficulty, Op. 40: IX. Valse in F-Sharp Minor, from the album Music for Better Memory – Classical Sounds for Study, Concentration, Brain Power, Easier Work with Mozart, Bach, Beethoven, was released in the year 2017. The duration of the song is 2:58. Download English songs online from JioSaavn.