Harmonic Tuner
Touch a harmonic node and let it ring. The tuner detects the pitch with sub-cent precision and identifies which harmonic position it should be — 5th fret octave, 7th fret fifth, 12th fret octave, and more.
Not started
—
−50¢0+50¢
Touch a harmonic to identify it.
Common harmonics (standard tuning)
| Fret | Harmonic | Note (6th str) | Note (5th str) | Note (4th str) |
|---|---|---|---|---|
| 12 | Octave (2nd) | E3 | A3 | D4 |
| 7 | Octave + 5th (3rd) | B3 | E4 | A4 |
| 5 | 2 Octaves (4th) | E4 | A4 | D5 |
| 9 | 2 Oct + M3 (5th) | G#4 | C#5 | F#5 |
| 4 / 7* | 2 Oct + 5th (6th) | B4 | E5 | A5 |
Why harmonics for tuning? Harmonics ring with a purer tone than fretted notes — no finger pressure to bend pitch, no fret wire contact. The 12th-fret harmonic is the most reliable check that your open string and octave are matched.
For setup: compare the 12th-fret harmonic (exact octave) to the 12th-fret fretted note to diagnose intonation drift without needing two separate captures.