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

[Diatonic scale]s

Jazz melodic minor">Jazz scale">Jazz melodic minor