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HQ8T

Tone Generator

Play any frequency from 20 Hz to 20 kHz.

440 Hz

Nearest note: A4 (0 cents)

Presets:
Wave shape

Start with low volume. High frequencies can be loud even when you can barely hear them, and can damage speakers or hearing.

How to use

  1. 1Set the frequency with the slider, the box or a preset.
  2. 2Pick a wave shape (sine is a pure tone).
  3. 3Keep the volume low and press Play.
  4. 4Download a 10-second WAV if you need the tone as a file.

Frequently asked questions

What can I use it for?

Testing speakers and subwoofers, checking left and right channels, tuning instruments to 440 Hz, and finding the highest pitch you can hear.

Why can't I hear very high tones?

Most adults can't hear above about 15–17 kHz, and many phone speakers can't play very low or very high tones.

What does the balance slider do?

It sends the tone to the left ear, both, or the right ear, handy for checking headphones.

Is it safe?

Keep the volume low, especially with headphones. Loud pure tones can be uncomfortable and harmful.

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