G♭ (musical note)
G♭ (G-flat) or Sol Bémol is the seventh semitone of the solfege.
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 pitch (music) for a discussion of historical variations in frequency.
Designation by octave
| Scientific designation | Helmholtz designation | Bilinear music notation | Octave name | Frequency (Hz) |
|---|---|---|---|---|
| G♭-1 | G♭͵͵͵ or ͵͵͵G♭ or GGGG♭ | (-uG♭) | Subsubcontra | 11.562 |
| G♭0 | G♭͵͵ or ͵͵G♭ or GGG♭ | (-vG♯) | Subcontra | 23.125 |
| G♭1 | G♭͵ or ͵G♭ or GG♭ | (-wG♭) | Contra | 46.249 |
| G♭2 | G♭ | (-xG♭) | Great | 92.499 |
| G♭3 | g♭ | (-yG♭) | Small | 184.997 |
| G♭4 | g♭′ | (zG♭) | One-lined | 369.994 |
| G♭5 | g♭′′ | (yG♭) | Two-lined | 739.989 |
| G♭6 | g♭′′′ | (xG♭) | Three-lined | 1479.978 |
| G♭7 | g♭′′′′ | (wG♭) | Four-lined | 2959.955 |
| G♭8 | g♭′′′′′ | (vG♭) | Five-lined | 5919.911 |
| G♭9 | g♭′′′′′′ | (uG♭) | Six-lined | 11839.822 |
| G♭10 | g♭′′′′′′′ | (tG♭) | Seven-lined | 23679.643 |
Scales
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♭
See also
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