A#2 — 116.54 Hz
A#2 (MIDI 46) vibrates 116.54 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
A#2 at different reference pitches
| Reference (A4) | A#2 frequency | Used for |
|---|---|---|
| 415 Hz | 109.92 Hz | Baroque pitch |
| 432 Hz | 114.42 Hz | “Verdi” pitch |
| 440 Hz | 116.54 Hz | Standard concert pitch |
| 442 Hz | 117.07 Hz | European orchestras |
| 444 Hz | 117.60 Hz | European orchestras |
Physical properties
- Period: one cycle every 8.58 ms
- Wavelength in air: ≈ 2.94 m (at 20 °C, 343 m/s)
- MIDI note number: 46
- Octave up: A#3 = 233.08 Hz · Octave down: 58.27 Hz