G♭ (musical note)

G♭ (G-flat; also called Ges or sol bémol) is the seventh semitone of the solfège.

It lies a diatonic semitone above F and a chromatic semitone below G, thus being enharmonic to F♯ (F-sharp) or fa dièse. However, in some temperaments, it is not the same as F♯. G♭ is a major third below B♭, whereas F♯ is a major third above D (a minor third below A).

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the G♭ semitone is approximately 369.994 Hz. See musical pitch for a discussion of historical variations in frequency.

Common scales beginning on G♭

 * G♭ major: G♭ A♭ B♭ C♭ D♭ E♭ F G♭
 * G♭ natural minor: G♭ A♭ B𝄫 C♭ D♭ E𝄫 F♭ G♭
 * G♭ harmonic minor: G♭ A♭ B𝄫 C♭ D♭ E𝄫 F G♭
 * G♭ melodic minor ascending: G♭ A♭ B𝄫 C♭ D♭ E♭ F G♭
 * G♭ melodic minor descending: G♭ F♭ E𝄫 D♭ C♭ B𝄫 A♭ G♭

Diatonic scales

 * G♭ Ionian: G♭ A♭ B♭ C♭ D♭ E♭ F G♭
 * G♭ Dorian: G♭ A♭ B𝄫 C♭ D♭ E♭ F♭ G♭
 * G♭ Phrygian: G♭ A𝄫 B𝄫 C♭ D♭ E𝄫 F♭ G♭
 * G♭ Lydian: G♭ A♭ B♭ C D♭ E♭ F G♭
 * G♭ Mixolydian: G♭ A♭ B♭ C♭ D♭ E♭ F♭ G♭
 * G♭ Aeolian: G♭ A♭ B𝄫 C♭ D♭ E𝄫 F♭ G♭
 * G♭ Locrian: G♭ A𝄫 B𝄫 C♭ D𝄫 E𝄫 F♭ G♭

Jazz melodic minor

 * G♭ ascending melodic minor: G♭ A♭ B𝄫 C♭ D♭ E♭ F G♭
 * G♭ Dorian ♭2: G♭ A𝄫 B𝄫 C♭ D♭ E♭ F♭ G♭
 * G♭ Lydian augmented: G♭ A♭ B♭ C D E♭ F G♭
 * G♭ Lydian dominant: G♭ A♭ B♭ C D♭ E♭ F♭ G♭
 * G♭ Mixolydian ♭6: G♭ A♭ B♭ C♭ D♭ E𝄫 F♭ G♭
 * G♭ Locrian ♮2: G♭ A♭ B𝄫 C♭ D𝄫 E𝄫 F♭ G♭
 * G♭ altered: G♭ A𝄫 B𝄫 C𝄫 D𝄫 E𝄫 F♭ G♭