G (musical note)

G (musical note)

Sol, So, or G is the fifth note of the fixed-Do solfège starting on C. As such it is the dominant, a perfect fifth above C or perfect fourth below C.

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of Middle G (G4) note is approximately 391.995 Hz. See pitch for a discussion of historical variations in frequency.

It has enharmonic equivalents of Fdouble sharp (a diatonic semitone below G) and Adouble flat (a diatonic semitone above G).

Designation by octave

Scientific designation Helmholtz designation Octave name Frequency (Hz)
G-1 G͵͵͵ Subsubcontra 12.25
G0 G͵͵ Subcontra 24.5
G1 Contra 48.999
G2 G Great 97.999
G3 g Small 195.998
G4 g′ One-lined 391.995
G5 g′′ Two-lined 783.991
G6 g′′′ Three-lined 1567.982
G7 g′′′′ Four-lined 3135.963
G8 g′′′′′ Five-lined 6271.927
G9 g′′′′′′ Six-lined 12543.854
G10 g′′′′′′ Seven-lined 25087.708

See also