A7 — 3520.00 Hz
A7 (MIDI 105) vibrates 3520.00 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
A7 at different reference pitches
| Reference (A4) | A7 frequency | Used for |
|---|---|---|
| 415 Hz | 3320.00 Hz | Baroque pitch |
| 432 Hz | 3456.00 Hz | “Verdi” pitch |
| 440 Hz | 3520.00 Hz | Standard concert pitch |
| 442 Hz | 3536.00 Hz | European orchestras |
| 444 Hz | 3552.00 Hz | European orchestras |
Physical properties
- Period: one cycle every 0.28 ms
- Wavelength in air: ≈ 9.7 cm (at 20 °C, 343 m/s)
- MIDI note number: 105
- Octave up: A7 = 7040.00 Hz · Octave down: 1760.00 Hz