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
Magnificat in E-flat major, BWV 243a the D major version of the Magnificat (and not the E-flat major version). The Neue Bach Ausgabe published the E-flat major version in 1955, edited by Alfred Dürr. Novello published an edition in 2000, edited by Neil Jenkins. Bärenreiter published a critical edition based on Dürr's 1955 edition again in 2014/15. Bach composed the work for five soloists: two sopranos, alto, tenor and bass. The soloists are listed in the table in the order SATB. For some recordings, only one soprano soloist is listed. Recordings with orchestras on period instruments in historically informed performances are highlighted. The first recordings in