D2 — 73.42 Hz
D2 (MIDI 38) vibrates 73.42 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
D2 at different reference pitches
| Reference (A4) | D2 frequency | Used for |
|---|---|---|
| 415 Hz | 69.24 Hz | Baroque pitch |
| 432 Hz | 72.08 Hz | “Verdi” pitch |
| 440 Hz | 73.42 Hz | Standard concert pitch |
| 442 Hz | 73.75 Hz | European orchestras |
| 444 Hz | 74.08 Hz | European orchestras |
Physical properties
- Period: one cycle every 13.62 ms
- Wavelength in air: ≈ 4.67 m (at 20 °C, 343 m/s)
- MIDI note number: 38
- Octave up: D3 = 146.83 Hz · Octave down: 36.71 Hz
Strings tuned to D2
- Guitar — Drop D (D A D G B E)
- Guitar — Open D (D A D F# A D)
- Guitar — Open G (D G D G B D)
- Guitar — DADGAD
- Guitar — Full Step Down (D G C F A D)
- Guitar — Double Drop D (D A D G B D)
- Bass Guitar — Standard (E A D G)
- Bass Guitar — Drop D (D A D G)
- Bass Guitar — 5-String (B E A D G)
- Bass Guitar — 6-String (B E A D G C)