Tone generator

Play a steady test tone at a chosen frequency, waveform, and left/right channel.

Sound is generated in this browser with WebAudio. Nothing is sent anywhere.

Your ears and equipment set the real range — many adults stop hearing somewhere around 12–15 kHz, and laptop speakers reproduce little below ~200 Hz. Left/right checks need stereo output; mono speakers and merged output will play both sides together.

How to use

  1. Set the frequency and waveform.
  2. Pick both, left, or right channel.
  3. Start low volume and play.

What it supports

20–20,000 Hz sine/square/triangle/sawtooth through a stereo panner. Real audibility depends on your ears and speakers — laptops reproduce little under ~200 Hz.

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