A♯ (musical note)

For other uses, see A♯.
{ \new Staff \with{ \magnifyStaff #3/2 } << \time 2/1 \override Score.TimeSignature #'stencil = ##f { \clef bass ais1_A-sharp \clef treble ais' } >> }
A1 to A6

A♯ (A-sharp; French: la dièse) is the eleventh semitone of the solfège.

This note lies a chromatic semitone above A and a diatonic semitone below B, thus being enharmonic to B♭ (French: si bémol).

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the A♯ above middle C is approximately 466.164Hz.[1] See pitch (music) for a discussion of historical variations in frequency.

Designation by octave

Scientific designation Helmholtz designation Octave name Frequency (Hz)
A♯−1 A♯͵͵͵ or ͵͵͵A♯ or AAAA♯ Subsubcontra 14.568
A♯0 A♯͵͵ or ͵͵A♯ or AAA♯ Subcontra 29.135
A♯1 A♯͵ or ͵A♯ or AA♯ Contra 58.27
A♯2 A♯ Great 116.541
A♯3 a♯ Small 233.082
A♯4 a♯′ One-lined 466.164
A♯5 a♯′′ Two-lined 932.328
A♯6 a♯′′′ Three-lined 1864.655
A♯7 a♯′′′′ Four-lined 3729.31
A♯8 a♯′′′′′ Five-lined 7458.62
A♯9 a♯′′′′′′ Six-lined 14917.24
A♯10 a♯′′′′′′′ Seven-lined 29834.481

Scales

Common scales beginning on A♯

  • A♯ major: A♯ B♯ Cdouble sharp D♯ E♯ Fdouble sharp Gdouble sharp A♯
  • A♯ natural minor: A♯ B♯ C♯ D♯ E♯ F♯ G♯ A♯
  • A♯ harmonic minor: A♯ B♯ C♯ D♯ E♯ F♯ Gdouble sharp A♯
  • A♯ melodic minor ascending: A♯ B♯ C♯ D♯ E♯ Fdouble sharp Gdouble sharp A♯
  • A♯ melodic minor descending: A♯ G♯ F♯ E♯ D♯ C♯ B♯ A♯

Diatonic scales

  • A♯ Ionian: A♯ B♯ Cdouble sharp D♯ E♯ Fdouble sharp Gdouble sharp A♯
  • A♯ Dorian: A♯ B♯ C♯ D♯ E♯ Fdouble sharp G♯ A♯
  • A♯ Phrygian: A♯ B C♯ D♯ E♯ F♯ G♯ A♯
  • A♯ Lydian: A♯ B♯ Cdouble sharp Ddouble sharp E♯ Fdouble sharp Gdouble sharp A♯
  • A♯ Mixolydian: A♯ B♯ Cdouble sharp D♯ E♯ Fdouble sharp G♯ A♯
  • A♯ Aeolian: A♯ B♯ C♯ D♯ E♯ F♯ G♯ A♯
  • A♯ Locrian: A♯ B C♯ D♯ E F♯ G♯ A♯

Jazz melodic minor

References

  1. ^ Suits, B. H. (1998). "Physics of Music Notes – Scales: Just vs Equal Temperament". MTU.edu. Michigan Technological University. Retrieved 5 February 2024.
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