Listen to Etude No. 5 in G-Flat Major, Op. 10: "Black Keys" online. Etude No. 5 in G-Flat Major, Op. 10: "Black Keys" is an English language song and is sung by Peter Schmalfuss. Etude No. 5 in G-Flat Major, Op. 10: "Black Keys", from the album Chopin: Etudes, Op. 10 - Fantasy, Op. 49 - Impromptus - Nocturnes, was released in the year 2009. The duration of the song is 1:37. Download English songs online from JioSaavn.