C#6 — 1108.73 Hz
C#6 (MIDI 85) vibrates 1108.73 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
C#6 at different reference pitches
| Reference (A4) | C#6 frequency | Used for |
|---|---|---|
| 415 Hz | 1045.73 Hz | Baroque pitch |
| 432 Hz | 1088.57 Hz | “Verdi” pitch |
| 440 Hz | 1108.73 Hz | Standard concert pitch |
| 442 Hz | 1113.77 Hz | European orchestras |
| 444 Hz | 1118.81 Hz | European orchestras |
Physical properties
- Period: one cycle every 0.90 ms
- Wavelength in air: ≈ 30.9 cm (at 20 °C, 343 m/s)
- MIDI note number: 85
- Octave up: C#7 = 2217.46 Hz · Octave down: 554.37 Hz