B0 — 30.87 Hz
B0 (MIDI 23) vibrates 30.87 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
B0 at different reference pitches
| Reference (A4) | B0 frequency | Used for |
|---|---|---|
| 415 Hz | 29.11 Hz | Baroque pitch |
| 432 Hz | 30.31 Hz | “Verdi” pitch |
| 440 Hz | 30.87 Hz | Standard concert pitch |
| 442 Hz | 31.01 Hz | European orchestras |
| 444 Hz | 31.15 Hz | European orchestras |
Physical properties
- Period: one cycle every 32.40 ms
- Wavelength in air: ≈ 11.11 m (at 20 °C, 343 m/s)
- MIDI note number: 23
- Octave up: B1 = 61.74 Hz · Octave down: 15.43 Hz