A-sharp (musical note)
A 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.
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. See pitch (music) for a discussion of historical variations in frequency.
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 scale]s
- 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">Jazz scale">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