The mandolin is tuned like a violin, G D A E, with each note doubled on a pair of strings. Tune each string of a pair on its own (mute the other with a finger), then check that the pair sounds as one.
Mandolin tuning
| Tuning | Strings | Frequencies (Hz, A4 = 440) |
|---|---|---|
| Standard | G3 D4 A4 E5 | 196.00 · 293.66 · 440.00 · 659.26 |