G-flat major Rondo-Finale of his Seventh Symphony. Mahler's Tenth Symphony was composed in the enharmonic key of F-sharp major. This key is more often found in piano music, as the use of all five black keys allows an easier conformity to the player's hands, despite the numerous flats. Austrian composer Franz Schubert chose this key for his third impromptu from his first collection of impromptus (1827). Polish composer Frédéric Chopin wrote two études in the key of G-flat major: Étude Op. 10, No. 5 "Black Key" and Étude Op. 25, No. 9 "Butterfly". French composer Claude Debussy used this key for one
Phrygian dominant scale V/VI. This scale occurs in Indian, Middle Eastern, Eastern European, Central Asian, and Flamenco music. It is common in Arabic and Egyptian music, in which it is called "Hijaz-Nahawand" or "Hijaz maqam", and used in Hebrew prayers and Klezmer music, where it is known as "Ahava Rabbah", "Freygish" or just the "Jewish scale", and is called "Dastgāh-e Homāyoun" in Iran. It is the most common scale in North Indian classical raga "Hijaz Bhairav (Basant Mukhari)" and South Indian raga "Vakulabharanam". It is sometimes called the "Spanish Phrygian scale", "Spanish Gypsy scale" (see: gypsy scale) or "Phrygian major scale" (see: phrygian