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
Harmonic major scale Notice the sixth note in the sequence is lowered, from G to G. The B harmonic major scale can also be obtained from the B harmonic minor scale, which is B C D E F G A, by raising the D to D. The B harmonic major scale may be derived from the E melodic minor scale with a raised fourth: E F G A B C D. The harmonic major scale may also be considered a synthetic scale, primarily used for implying and relating to various altered chords, with major and minor qualities in each tetrachord. Thus the musical