F♯ (musical note)
F♯ (F-sharp; also known as fa dièse or fi) is the seventh semitone of the solfège.
It lies a chromatic semitone above F and a diatonic semitone below G, thus being enharmonic to sol bémol or G♭ (G-flat) in 12 equal temperament. However, in other temperaments, such as quarter-comma meantone, it is not the same as G♭. G♭ is a major third below B♭, whereas F♯ is a major third above D (a minor third below A). Another enharmonic note is E
(E-double sharp).
When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the F♯ above middle C (or F♯4) is approximately 369.994Hz.[1] See pitch (music) for a discussion of historical variations in frequency.
Designation by octave
| Scientific designation | Helmholtz designation | Octave name | Frequency (Hz) | MIDI note number |
|---|---|---|---|---|
| F♯−1 | F♯͵͵͵ or ͵͵͵F♯ or FFFF♯ | Subsubcontra | 11.562 | 6 |
| F♯0 | F♯͵͵ or ͵͵F♯ or FFF♯ | Subcontra | 23.125 | 18 |
| F♯1 | F♯͵ or ͵F♯ or FF♯ | Contra | 46.249 | 30 |
| F♯2 | F♯ | Great | 92.499 | 42 |
| F♯3 | f♯ | Small | 184.997 | 54 |
| F♯4 | f♯′ | One-lined | 369.994 | 66 |
| F♯5 | f♯′′ | Two-lined | 739.989 | 78 |
| F♯6 | f♯′′′ | Three-lined | 1479.978 | 90 |
| F♯7 | f♯′′′′ | Four-lined | 2959.955 | 102 |
| F♯8 | f♯′′′′′ | Five-lined | 5919.911 | 114 |
| F♯9 | f♯′′′′′′ | Six-lined | 11839.822 | 126 |
| F♯10 | f♯′′′′′′′ | Seven-lined | 23679.643 | N/A |
Scales
Common scales beginning on F♯
- F♯ major: F♯ G♯ A♯ B C♯ D♯ E♯ F♯
- F♯ natural minor: F♯ G♯ A B C♯ D E F♯
- F♯ harmonic minor: F♯ G♯ A B C♯ D E♯ F♯
- F♯ melodic minor ascending: F♯ G♯ A B C♯ D♯ E♯ F♯
- F♯ melodic minor descending: F♯ E D C♯ B A G♯ F♯
- F♯ Ionian: F♯ G♯ A♯ B C♯ D♯ E♯ F♯
- F♯ Dorian: F♯ G♯ A B C♯ D♯ E F♯
- F♯ Phrygian: F♯ G A B C♯ D E F♯
- F♯ Lydian: F♯ G♯ A♯ B♯ C♯ D♯ E♯ F♯
- F♯ Mixolydian: F♯ G♯ A♯ B C♯ D♯ E F♯
- F♯ Aeolian: F♯ G♯ A B C♯ D E F♯
- F♯ Locrian: F♯ G A B C D E F♯
- F♯ ascending melodic minor: F♯ G♯ A B C♯ D♯ E♯ F♯
- F♯ Dorian ♭2: F♯ G A B C♯ D♯ E F♯
- F♯ Lydian augmented: F♯ G♯ A♯ B♯ C D♯ E♯ F♯
- F♯ Lydian dominant: F♯ G♯ A♯ B♯ C♯ D♯ E F♯
- F♯ Mixolydian ♭6: F♯ G♯ A♯ B C♯ D E F♯
- F♯ Locrian ♮2: F♯ G♯ A B C D E F♯
- F♯ altered: F♯ G A B♭ C D E F♯
References
- ^ Suits, B. H. (1998). "Physics of Music Notes - Scales: Just vs Equal Temperament". MTU.edu. Michigan Technological University. Archived from the original on 27 November 2023. Retrieved 5 February 2024.