432 Hz tone
The alternative tuning.
Volume first. Turn your device volume down before pressing play, then raise it slowly. Tones start quiet on purpose. Keep headphones off your ears until you know how loud it is.
Hz
Logarithmic slider, 1 Hz to 22 kHz. Space bar starts and stops.Waveform
0 dBFS is the loudest your device can play; every 20 dB lower is a tenth of the amplitude.
What 432 Hz is used for
Some musicians tune A to 432 Hz instead of 440 Hz. It is a legitimate stylistic choice; claims that it has special healing properties have no scientific support.
| Period | 2.315 ms |
|---|---|
| Wavelength in air (20 °C) | 79.4 cm |
| One octave down / up | 216 Hz / 864 Hz |
The generator above starts at 432 Hz. You can still move the slider to any other frequency, or open the full tone generator.
Questions people ask
Why can't I hear the 432 Hz tone?
Check the tab is not muted and the correct output device is selected. 432 Hz is well within the range of nearly every speaker and headphone.
How long is one cycle of 432 Hz?
2.315 milliseconds. In room-temperature air the wavelength is about 79.4 centimetres.
Keep testing
- Tone generatorSine, square, triangle and sawtooth from 1 Hz to 22 kHz.
- Frequency sweepLogarithmic or linear sweeps over any range and duration.
- Speaker testChannel, range and polarity checks for stereo speakers.