Possible Clues:

• Chopin's Mazurka in ___
• Sounds as if it's just a part meant, by the sound of it
• Second of three black keys
• Not how one might live there
• Key of Chopin's Polonaise, opus 53
• Key favored by Chopin
• If one's not sharp, by the sound of it, one may still get this apartment
• Key of Elgar's Symphony No. 1
• Black key above a G
• G sharp