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 of harmonic major but have not been recognized as doing so. Examples are 'After You've Gone', 'Blackbird', 'Sleep Walk', 'Dream A Little Dream Of Me'. Harmonic major scale In music theory, the harmonic major scale is a musical scale found in some music from the common practice era and now used occasionally, most often in jazz. It was named by Rimsky-Korsakov. In George Russell's "Lydian Chromatic Concept" it is the fifth mode (V) of the Lydian Diminished scale. It can be considered a major scale with the sixth degree lowered, Ionian 13, or the harmonic minor scale with the third