G-sharp (musical note)


G♯ or sol dièse is the ninth semitone of the solfège. In the German pitch nomenclature, it is known as gis.
It lies a chromatic semitone above G and a diatonic semitone below A, thus being enharmonic to la bémol or A.
When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the G♯ semitone is approximately 415.305 Hz. 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.
In the medieval period the musical note G# was known as gesolreut within the Guidonian hand hexachord system.

Scales

Common scales beginning on G

[Diatonic scale]s

[Jazz scale#Modes of the [melodic minor scale|Jazz melodic minor]]