C#7 — 2217.46 Hz
C#7 (MIDI 97) vibrates 2217.46 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
C#7 at different reference pitches
| Reference (A4) | C#7 frequency | Used for |
|---|---|---|
| 415 Hz | 2091.47 Hz | Baroque pitch |
| 432 Hz | 2177.14 Hz | “Verdi” pitch |
| 440 Hz | 2217.46 Hz | Standard concert pitch |
| 442 Hz | 2227.54 Hz | European orchestras |
| 444 Hz | 2237.62 Hz | European orchestras |
Physical properties
- Period: one cycle every 0.45 ms
- Wavelength in air: ≈ 15.5 cm (at 20 °C, 343 m/s)
- MIDI note number: 97
- Octave up: C#7 = 4434.92 Hz · Octave down: 1108.73 Hz