Étude No. 9 in G-Flat Major, Op. 25 “Butterfly”: I. Allegro assai

歌曲	Étude No. 9 in G-Flat Major, Op. 25 “Butterfly”: I. Allegro assai
歌手	Igor Kluson
专辑	Chopin Study Music: Relaxing Classical Instruments for Concentration and Focus