D#6 — 1244.51 Hz
D#6 (MIDI 87) vibrates 1244.51 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
D#6 at different reference pitches
| Reference (A4) | D#6 frequency | Used for |
|---|---|---|
| 415 Hz | 1173.80 Hz | Baroque pitch |
| 432 Hz | 1221.88 Hz | “Verdi” pitch |
| 440 Hz | 1244.51 Hz | Standard concert pitch |
| 442 Hz | 1250.16 Hz | European orchestras |
| 444 Hz | 1255.82 Hz | European orchestras |
Physical properties
- Period: one cycle every 0.80 ms
- Wavelength in air: ≈ 27.6 cm (at 20 °C, 343 m/s)
- MIDI note number: 87
- Octave up: D#7 = 2489.02 Hz · Octave down: 622.25 Hz