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
Waltz in A-flat major, Op. 42 (Chopin) hand accompaniment. This waltz contains many virtuosic passages and a mesmerizing coda, making it a favourite for every audience. It is often considered one of Chopin's most important waltzes and is also one of the most challenging to play. U.S. President Harry S. Truman, an amateur pianist, told friends that Chopin's Waltz in A-flat major was one of his favorite compositions. Waltz in A-flat major, Op. 42 (Chopin) Waltz in A-flat major, Op. 42, is a lively waltz composed by Frédéric Chopin in 1840. Though none of Chopin's works were actually intended to be danced to, this waltz does appear