G♯2 / A♭2
103.826Hz at concert pitch
Press to hear a pure sine tone at this pitch.
MIDI note
44
Piano key
24
Octave
2
Frequency
103.826 Hz
Period
9.6315 ms
Wavelength
3.3036 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♯2 and A♭2) name the same pitch two ways.
At other reference pitches
| Reference (A4) | G♯2 frequency | Where you meet it |
|---|---|---|
| 432 Hz | 101.938 Hz | the alternative-tuning circle |
| 440 Hzstandard | 103.826 Hz | the ISO 16 standard — concert pitch |
| 442 Hz | 104.298 Hz | many European orchestras tune a touch sharp |
| 443 Hz | 104.534 Hz | some sharper continental orchestras |
Every row is G♯2 — only the A4 you tune to changes. A frequency scales straight with the reference: G♯2 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.