F♯ (musical note)

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F♯ (eff-sharp or 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). However, in some temperaments, 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).

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 F4) is approximately 369.994 Hz. See pitch (music) for a discussion of historical variations in frequency.

Designation by octave[edit]

Scientific designation Helmholtz designation Bilinear music notation Octave name Frequency (Hz)
F-1 F͵͵͵ or ͵͵͵F or FFFF (-uF) Subsubcontra 11.562
F0 F͵͵ or ͵͵F or FFF (-vF) Subcontra 23.125
F1 F͵ or ͵F or FF (-wF) Contra 46.249
F2 F (-xF) Great 92.499
F3 f (-yF) Small 184.997
F4 f (zF) One-lined 369.994
F5 f′′ (yF) Two-lined 739.989
F6 f′′′ (xF) Three-lined 1479.978
F7 f′′′′ (wF) Four-lined 2959.955
F8 f′′′′′ (vF) Five-lined 5919.911
F9 f′′′′′′ (uF) Six-lined 11839.822
F10 f′′′′′′′ (tF) Seven-lined 23679.643

Common scales beginning on F[edit]

  • 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 G A B C D E F
  • F Dorian: F G A B C D E F

See also[edit]