Sol or G is the fifth note of the solfège.This article is assuming C as Do, do not make the mistake of thinking G is always Sol.
When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the G note is approximately 391.995 Hz. See pitch for a discussion of historical variations in frequency.
It has 2 enharmonics: Fx and A♭♭.
Designation by octave
| Scientific Designation | Helmholtz Designation | Octave Name | Frequency (Hz) |
|---|---|---|---|
| G-1 | Gˌˌˌ | Subsubcontra | 12.25 |
| G0 | Gˌˌ | Subcontra | 24.5 |
| G1 | Gˌ | 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 | 3135.964 |
| G8 | g′″″ | Five-lined | 6271.927 |
| G9 | g″″″ | Six-lined | 12543.854 |
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