Audio tool

Tone Generator

Play a sine, square or sawtooth tone at any frequency.

Free Files stay on your device
440 Hz
Presets:

About this tool

Tone Generator plays a pure tone at the exact frequency you choose. Use it to test speakers and headphones, check your hearing range, tune instruments or make test files.

How to use Tone Generator

  1. Set the frequency with the slider, the box or a preset.
  2. Pick a waveform and volume, then press Play.
  3. Set a duration and press “Download WAV” to save the tone.

Questions people ask

What frequencies can people hear?

Roughly 20 Hz to 20,000 Hz. The upper limit drops with age, and many adults cannot hear above 15,000–17,000 Hz.

What is the difference between the waveforms?

Sine is a pure tone with no harmonics. Square and sawtooth add strong harmonics and sound buzzy. Triangle sits in between.

Why is A4 set to 440 Hz?

440 Hz is the international standard tuning pitch for the A above middle C. Each semitone up multiplies the frequency by 2^(1/12), about 1.0595.

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