A♯ (musical note)
For other uses, see A♯.
A♯ (A-sharp), or La Dièse, is the eleventh semitone of the solfege.
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 | Bilinear music notation | Octave name | Frequency (Hz) |
|---|---|---|---|---|
| A♯-1 | A♯͵͵͵ or ͵͵͵A♯ or AAAA♯ | (-uA♯) | Subsubcontra | 14.568 |
| A♯0 | A♯͵͵ or ͵͵A♯ or AAA♯ | (-vA♯) | Subcontra | 29.135 |
| A♯1 | A♯͵ or ͵A♯ or AA♯ | (-wA♯) | Contra | 58.270 |
| A♯2 | A♯ | (-xA♯) | Great | 116.541 |
| A♯3 | a♯ | (-yA♯) | Small | 233.082 |
| A♯4 | a♯′ | (zA♯) | One-lined | 466.164 |
| A♯5 | a♯′′ | (yA♯) | Two-lined | 932.328 |
| A♯6 | a♯′′′ | (xA♯) | Three-lined | 1864.655 |
| A♯7 | a♯′′′′ | (wA♯) | Four-lined | 3729.310 |
| A♯8 | a♯′′′′′ | (vA♯) | Five-lined | 7458.620 |
| A♯9 | a♯′′′′′′ | (uA♯) | Six-lined | 14917.240 |
| A♯10 | a♯′′′′′′′ | (tA♯) | Seven-lined | 29834.481 |
Scales
Common scales beginning on A♯
- A♯ Major: A♯ B♯ C
D♯ E♯ F G A♯ - A♯ Natural Minor: A♯ B♯ C♯ D♯ E♯ F♯ G♯ A♯
- A♯ Harmonic Minor: A♯ B♯ C♯ D♯ E♯ F♯ G A♯
- A♯ Melodic Minor Ascending: A♯ B♯ C♯ D♯ E♯ F G A♯
- A♯ Melodic Minor Descending: A♯ G♯ F♯ E♯ D♯ C♯ B♯ A♯
Diatonic scales
- A♯ Ionian: A♯ B♯ C D♯ E♯ F G A♯
- A♯ Dorian: A♯ B♯ C♯ D♯ E♯ F G♯ A♯
- A♯ Phrygian: A♯ B C♯ D♯ E♯ F♯ G♯ A♯
- A♯ Lydian: A♯ B♯ C D E♯ F G A♯
- A♯ Mixolydian: A♯ B♯ C D♯ E♯ F 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
- A♯ Ascending Melodic Minor: A♯ B♯ C♯ D♯ E♯ F G A♯
- A♯ Dorian ♭2: A♯ B C♯ D♯ E♯ F G♯ A♯
- A♯ Lydian Augmented: A♯ B♯ C D E F G A♯
- A♯ Lydian Dominant: A♯ B♯ C D E♯ F G♯ A♯
- A♯ Mixolydian ♭6: A♯ B♯ C D♯ E♯ F♯ G♯ A♯
- A♯ Locrian ♮2: A♯ B♯ C♯ D♯ E F♯ G♯ A♯
- A♯ Altered: A♯ B C♯ D E F♯ G♯ A♯
See also
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