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
B-flat major and dominant pitches. Many editions of the work, however, use no key signature and specify the instrument as "Timpani in B–F". Five of Mozart's piano concertos are in B-flat major. B-flat major In music theory, B-flat major is a major scale based on B, with pitches B, C, D, E, F, G, and A. Its key signature has two flats. Its relative minor is G minor and its parallel minor is B-flat minor. The B-flat major scale is: \override Score.TimeSignature #'stencil = ##f \relative c' { </score> Many transposing instruments are pitched in B-flat major, including the clarinet, trumpet, tenor