G♯3 / A♭3
207.652Hz at concert pitch
Press to hear a pure sine tone at this pitch.
MIDI note
56
Piano key
36
Octave
3
Frequency
207.652 Hz
Period
4.8157 ms
Wavelength
1.6518 m
Pitch class
G♯
Notation
SPN
MIDI is the note number synths and software pass around (0–127). Pitch class is the note without its octave — all the G♯s share one. Enharmonic spellings (G♯3 and A♭3) name the same pitch two ways.
At other reference pitches
| Reference (A4) | G♯3 frequency | Where you meet it |
|---|---|---|
| 432 Hz | 203.877 Hz | the alternative-tuning circle |
| 440 Hzstandard | 207.652 Hz | the ISO 16 standard — concert pitch |
| 442 Hz | 208.596 Hz | many European orchestras tune a touch sharp |
| 443 Hz | 209.068 Hz | some sharper continental orchestras |
Every row is G♯3 — only the A4 you tune to changes. A frequency scales straight with the reference: G♯3 at 432 Hz is the 440 Hz value times 432⁄440.
Move around
Every G♯
Chords with G♯ in them
G♯ appears in each of these — see the whole chord grid.