Minor scale based on the accidentals of the "natural" minor scale, not on those of the harmonic or melodic minor scales. For example, a piece in E minor will have one sharp in its key signature because the E natural minor scale has one sharp (F). Major and minor keys that share the same key signature are "relative" to each other. For instance, F major is the relative major of D minor since both have key signatures with one flat. Since the natural minor scale is built on the 6th degree of the major scale, the tonic of the relative minor is
G-flat major F-sharp major, G-flat major is rarely chosen as the main key for orchestral works, it is more often used as a main key for piano works, such as the impromptus of Chopin and Schubert. It is the predominant key of Maurice Ravel's "Introduction and Allegro" for harp, flute, clarinet and string quartet. A striking use of G-flat major can be found in the love duet "Tu l'as dit" that concludes the fourth act of Giacomo Meyerbeer's opera "Les Huguenots". Italian composer Ottorino Respighi composed Notturno in G-flat major, composed in 1904. In the canonic 24 keys, Alkan, Rachmaninoff, Scriabin, Shchedrin