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Tone GeneratorLocal
Generate a pure sine, square, triangle, or sawtooth test tone. Useful for speaker calibration, tinnitus matching, and sound design seeds.

Reference pitches

  • A4 (concert pitch): 440 Hz
  • A5: 880 Hz
  • Middle C (C4): ~261.6 Hz
  • E2 (low E on guitar): ~82.4 Hz
  • Hearing test fatigue: 8000 Hz

Always start at low amplitude when using test tones with headphones. Sine waves near your ear’s resonance (2–5 kHz) can damage hearing at levels that feel moderate.

⎆No files involved — the tone is synthesized locally in your browser.
How to use Tone Generator

  1. Set the frequency

    Drag the slider or type a Hz value between 20 and 20,000. 440 Hz is A4 concert pitch.

  2. Pick a waveform

    Sine is pure. Square/sawtooth sound buzzy and carry more harmonics. Triangle is mellow.

  3. Choose duration and amplitude

    Keep amplitude low when monitoring with headphones — pure tones can be louder than they feel.

  4. Preview and export

    Audition the tone, then download as WAV (lossless) or MP3.

Frequently asked questions
What is a test tone for?
Speaker polarity checks, hearing range tests, ear training, tuning, tinnitus matching, and sound design starting points.
Why does square sound louder than sine at the same amplitude?
Square waves have harmonics at odd multiples of the fundamental. Total energy is higher than a sine at equal peak.
Is it safe to play at high amplitude?
Not on headphones. Pure tones near 2–5 kHz can damage hearing at levels that feel moderate. Start below 25 percent amplitude.
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