Antonín Dvořák composed Humoresque No. 7 in G-flat major, while its middle section is in the parallel key (F-sharp minor, enharmonic equivalent to the theoretical G-flat minor).
John Rutter has chosen G-flat major for a number of his compositions, including "Mary's Lullaby" and "What sweeter music".[5] In a charity interview[6] he explained several of the reasons that drew him to this key. In many soprano voices there is a break round about E (a tenth above middle C) with the result that it is not their best note, bypassed in the key of G-flat major. It is thus, he claims, a very vocal key. Additionally, writing for strings, there are no open strings in this key, so that vibrato can be used on any note, making it a warm and expressive key. He also cites its facility on a piano keyboard.
References
^Mahler, Gustav. Symphonies Nos. 1 and 2 in Full Score, Dover, ISBN0-486-25473-9 (1987) p. 354.
^Mahler, Gustav. Symphonies Nos. 3 and 4 in Full Score, Dover, ISBN0-486-26166-2 (1989), p. 53.
^Mahler, Gustav. Symphonies Nos. 5 and 6 in Full Score, Dover, ISBN0-486-26888-8 (1991), p. 175.
^Mahler, Gustav. Symphony No. 7 in Full Score, Dover, ISBN0-486-27339-3 (1992), p. 223.
^Rutter, John (2005). John Rutter Carols. Oxford University Press. ISBN9780193533813.