It lies a
chromatic semitoneabove F and a diatonic semitonebelow G, thus being enharmonicto Sol Bémol or Gmusic|♭ (G-flat). However, in some temperaments, it is not the same as G-flat. G-flat is a perfect fifthbelow D-flat, whereas F sharp is a major thirdabove D. Thus Gmusic|flat is slightly lower in pitch.
When calculated in
equal temperamentwith a reference of A above middle C as 440 Hz, the frequencyof the Fmusic|♯ semitone is approximately 369.994 Hz. See pitch (music)for a discussion of historical variations in frequency.
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