🎵 Tone Generator
Generate pure tones, test specific frequencies, and check stereo balance with a precision tone generator.
Your settings
Keep up to 5 setups in this browser, or share a link. Only settings are saved.
No saved setups yet.
Frequently Asked Questions
What can I compare with this tone generator?
Use a fixed tone to repeat an audible rattle, compare left and right output, or demonstrate waveform differences. Keep your device and volume consistent. The generator supplies a signal; it does not measure a speaker's response or calibrate sound pressure.
Which waveform should I start with?
Start with sine at a low volume. Sine contains one frequency; square, triangle and sawtooth add harmonics and have different timbres. A harsher sound after changing waveform does not by itself establish equipment distortion.
Can I save or share the same settings?
Yes. Your settings saves up to five named setups in this browser. Copy settings link includes frequency, waveform, volume and balance. Loading a setup stops current playback; check the restored volume and press Play yourself.
Does an inaudible tone show that my hearing or speaker is faulty?
No. Your output route, headphones, speakers, browser processing and listening conditions affect what you hear. Do not increase the volume to chase an inaudible tone. This uncalibrated tool does not diagnose hearing conditions.
Choose the signal that answers your specific question
The frequency slider sets the oscillator's fundamental from 20 Hz to 20 kHz. Sine produces one frequency; square, triangle, and sawtooth also contain harmonics.
A repeatable check
- Select sine, center the balance, and lower both the page volume and system volume before pressing Play.
- Set a frequency you want to investigate. Change one control at a time so you can identify what caused a difference.
- Move balance toward each side to compare channels, then press Stop when the check is complete.
What the result suggests
- A square or sawtooth tone sounds buzzy
- That timbre is expected from its harmonics. Switch to sine at the same fundamental before treating the buzz as speaker distortion.
- A tone is absent despite a moving waveform
- Check the selected output and tab mute, then try a moderate midrange frequency. The graph shows a generated signal even if the physical output is muted or cannot reproduce it.
What this cannot establish
Volume percentage is digital gain, not dB SPL. The frequency setting does not certify acoustic output, and this tool cannot calibrate headphones or an external sound-level meter by itself.