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)
|
F♯−1 |
F♯͵͵͵ or ͵͵͵F♯ or FFFF♯ |
Subsubcontra |
11.562
|
F♯0 |
F♯͵͵ or ͵͵F♯ or FFF♯ |
Subcontra |
23.125
|
F♯1 |
F♯͵ or ͵F♯ or FF♯ |
Contra |
46.249
|
F♯2 |
F♯ |
Great |
92.499
|
F♯3 |
f♯ |
Small |
184.997
|
F♯4 |
f♯′ |
One-lined |
369.994
|
F♯5 |
f♯′′ |
Two-lined |
739.989
|
F♯6 |
f♯′′′ |
Three-lined |
1479.978
|
F♯7 |
f♯′′′′ |
Four-lined |
2959.955
|
F♯8 |
f♯′′′′′ |
Five-lined |
5919.911
|
F♯9 |
f♯′′′′′′ |
Six-lined |
11839.822
|
F♯10 |
f♯′′′′′′′ |
Seven-lined |
23679.643
|
Scales
Common scales beginning on F♯
References
See also