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Audio Frequency and Tone Generator

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Explore tones from 20 Hz to 20 kHz, compare four oscillator waveforms, and adjust the volume with this simple browser-based tone generator.

440 Hz
Output stopped
440 Hz
20 Hz 20 kHz
Sine
25%
0% 100%

Your browser generates the oscillator in real time using the Web Audio API.

About Audio Frequency and Tone Generator

Generate a continuous tone directly in your browser with adjustable frequency, waveform, and volume. Audio Frequency and Tone Generator offers sine, square, sawtooth, and triangle waves, plus a one-click reset to A4 at 440 Hz.

Features

  • Frequency control from 20 Hz to 20 kHz
  • Sine, square, sawtooth, and triangle waveforms
  • Adjustable output volume
  • Start and stop controls
  • One-click reset to A4 at 440 Hz

How to Use

  1. Start with a low volume on both the tool and your speakers or headphones.
  2. Choose a waveform and set the frequency.
  3. Select Start Tone to hear the oscillator.
  4. Adjust frequency or volume while the tone plays to explore the sound.
  5. Select Reset to A4 to return the frequency to 440 Hz.
  6. Select Stop Tone when finished.

Frequently Asked Questions

What does Audio Frequency and Tone Generator do?

It generates a continuous oscillator tone in your browser with adjustable frequency, waveform, and volume.

What does the 440 Hz reset change?

It returns the frequency to A4 at 440 Hz while keeping your waveform and volume settings.

Why can I not hear some frequencies?

Hearing range varies, and speakers or headphones may not reproduce very low or very high frequencies. Do not increase the volume to compensate.

Is Audio Frequency and Tone Generator free, and do I need to install anything?

It is free and runs directly in a compatible browser without installation.

Browser Requirements

Modern browser with JavaScript enabled and Web Audio API support.

Topics

synthesizer sound design frequency pitch

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