A♭ (musical note)
Appearance
(Redirected from A-flat (musical note))
![{ \new Staff \with{ \magnifyStaff #3/2 } << \time 2/1 \override Score.TimeSignature #'stencil = ##f { \clef bass aes1_A-flat \clef treble aes' } >> }](http://upload.wikimedia.org/score/i/f/ifdc580faqk09b8uh1wmqi4zy7p8dk2/ifdc580f.png)
A♭ (A-flat; also called la bémol) is the ninth semitone of the solfège.
It lies a diatonic semitone above G and a chromatic semitone below A, thus being enharmonic to G♯, even though in some musical tunings, A♭ will have a different sounding pitch than G♯.
When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the A♭ above middle C (or A♭4) is approximately 415.305 Hz.[1] See pitch (music) for a discussion of historical variations in frequency.
The notes A♭ and G♯ are the only notes to have only one enharmonic, since they cannot be reached in any other way by a single or double sharp or a single or double flat from any of the seven white notes.
Designation by octave
[edit]Scientific designation | Helmholtz designation | Octave name | Frequency (Hz) |
---|---|---|---|
A♭−1 | A♭͵͵͵ or ͵͵͵A♭ or AAAA♭ | Octocontra | 12.978 |
A♭0 | A♭͵͵ or ͵͵A♭ or AAA♭ | Subcontra | 25.957 |
A♭1 | A♭͵ or ͵A♭ or AA♭ | Contra | 51.913 |
A♭2 | A♭ | Great | 103.826 |
A♭3 | a♭ | Small | 207.652 |
A♭4 | a♭′ | One-lined | 415.305 |
A♭5 | a♭′′ | Two-lined | 830.609 |
A♭6 | a♭′′′ | Three-lined | 1661.219 |
A♭7 | a♭′′′′ | Four-lined | 3322.438 |
A♭8 | a♭′′′′′ | Five-lined | 6644.875 |
A♭9 | a♭′′′′′′ | Six-lined | 13289.75 |
A♭10 | a♭′′′′′′′ | Seven-lined | 26579.501 |
Scales
[edit]Common scales beginning on A♭
[edit]- 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♭
- 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♭
- 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♭
References
[edit]- ^ Suits, B. H. (1998). "Physics of Music Notes - Scales: Just vs Equal Temperament". MTU.edu. Michigan Technological University. Retrieved 5 February 2024.