A%E2%99%AF (musical Note)
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A%E2%99%AF Musical Note
A Sharp

A (A-sharp), or la dièse, is the eleventh semitone of the solfege. In some countries (where B is known as H) it is informally called B.

This note lies a chromatic semitone above A and a diatonic semitone below B, thus being enharmonic to si bémol or B (B-flat).

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 466.164 Hz. 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
A0 A or A or AAA Subcontra 29.135
A1 A? or ?A or AA Contra 58.27
A2 A Great 116.541
A3 a Small 233.082
A4 a One-lined 466.164
A5 a′′ Two-lined 932.328
A6 a′′′ Three-lined 1864.655
A7 a′′′′ Four-lined 3729.31
A8 a′′′′′ Five-lined 7458.62
A9 a′′′′′′ Six-lined 14917.24
A10 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

See also



  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

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