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. See pitch (music) for a discussion of historical variations in frequency.

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♯

Diatonic scales

 * 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♯

Jazz melodic minor

 * 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♯