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.

[1]

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

F♯ (musical note)

Designation by octave

Scales

Common scales beginning on F♯

Diatonic scales

Jazz melodic minor

References

See also

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