D4 — 293.66 Hz
D4 (MIDI 62) vibrates 293.66 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
D4 at different reference pitches
| Reference (A4) | D4 frequency | Used for |
|---|---|---|
| 415 Hz | 276.98 Hz | Baroque pitch |
| 432 Hz | 288.33 Hz | “Verdi” pitch |
| 440 Hz | 293.66 Hz | Standard concert pitch |
| 442 Hz | 295.00 Hz | European orchestras |
| 444 Hz | 296.33 Hz | European orchestras |
Physical properties
- Period: one cycle every 3.41 ms
- Wavelength in air: ≈ 1.17 m (at 20 °C, 343 m/s)
- MIDI note number: 62
- Octave up: D5 = 587.33 Hz · Octave down: 146.83 Hz
Strings tuned to D4
- 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 — Drop C (C G C F A D)
- Guitar — Double Drop D (D A D G B D)
- Ukulele — D Tuning (A D F# B)
- Violin — Standard (G D A E)
- Viola — Standard (C G D A)
- Banjo — Open G (g D G B D)
- Banjo — Double C (g C G C D)
- Mandolin — Standard (G D A E)
- Irish Bouzouki — GDAD
- Cavaquinho — Standard (D G B D)
- Dobro / Resonator — Open G (G B D G B D)