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
Scherzo in A-flat major (Borodin) length of the movement is around eight minutes. Scherzo in A-flat major (Borodin) Alexander Borodin's Scherzo in A-flat major is a lively piece written in 1885, while Borodin was in Belgium for an early performance of his then incomplete opera "Prince Igor". It was originally written for solo piano but in 1889 Alexander Glazunov orchestrated it, along with the "Petite Suite". Borodin dedicated the piece to Théodore Jadoul, who made a four-hand piano arrangement of it. The Scherzo can be recognized as one of Borodin's compositions instantaneously because of its bright tone, pounding rhythms and exciting melodies. In the main