D#5 — 622.25 Hz
D#5 (MIDI 75) vibrates 622.25 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
D#5 at different reference pitches
| Reference (A4) | D#5 frequency | Used for |
|---|---|---|
| 415 Hz | 586.90 Hz | Baroque pitch |
| 432 Hz | 610.94 Hz | “Verdi” pitch |
| 440 Hz | 622.25 Hz | Standard concert pitch |
| 442 Hz | 625.08 Hz | European orchestras |
| 444 Hz | 627.91 Hz | European orchestras |
Physical properties
- Period: one cycle every 1.61 ms
- Wavelength in air: ≈ 55.1 cm (at 20 °C, 343 m/s)
- MIDI note number: 75
- Octave up: D#6 = 1244.51 Hz · Octave down: 311.13 Hz