Frequency
440.0 hertz
Nearest note A 4
in tune
- Period
- 2.273 ms
- Wavelength in air
- 78 cm
Frequency
440.0 Hz
Notes
Most music today is tuned to 440.
Sound
30%
With headphones, start low, especially for high tones.
Second tone
Two tones a few hertz apart pulse against each other. As one is brought to the other, the pulse slows, and stops.
Sweep
A glide from one frequency to another at a steady level. Press Mark when a sound appears or fades, and the frequency at that moment is noted.
Saved
Setups you save wait here, each ready to play with one press.
Keys
- Space
- Play or stop
- ↑ ↓
- A semitone
- Shift ↑ ↓
- One hertz
- Alt ↑ ↓
- A tenth of a hertz
- Page Up, Page Down
- An octave
- 0 to 9
- Type a frequency
- M
- Mark, during a sweep