Listen to 12 Études in All the Minor Keys, Op. 39: Study 9. Adagio in C sharp minor online. 12 Études in All the Minor Keys, Op. 39: Study 9. Adagio in C sharp minor is an Unknown language song and is sung by Beautiful Pianists. 12 Études in All the Minor Keys, Op. 39: Study 9. Adagio in C sharp minor, from the album Perfect Piano The 200 Best Piano Classics Part 1, was released in the year 2018. The duration of the song is 10:05. Download Unknown songs online from JioSaavn.