Online Tone Generator
440Hz
Set a frequency, keep the volume low, then press play.
Useful tone presets
Pick a tone and adjust from there Waveform
Start near silent, then raise the volume slowly.
Fine controls
Safety
Before you press play
Start near silent, then raise the volume slowly.
Common uses
Reference notesSpeaker Testing
Play a steady tone and listen for rattles, dropouts, or one speaker sounding weaker than the other.
Audio Calibration
Send a known tone through your interface, mixer, or monitors while you set levels.
Music Practice
Use a fixed pitch for tuning, interval drills, or quick ear checks.
Hearing Awareness
Try different ranges at low volume and stop if a tone feels sharp or tiring.
Frequency range guide
20 Hz - 20 kHz20HzSub-bass
60HzBass
250HzMidrange
2kHzPresence
6kHzAir
20kHzLimit
Compare waveforms
Popular reference tones
These are common starting points. Use the preset buttons above when you want to play one.
- 440 Hz
- Concert A
- 1 kHz
- Reference tone
- 100 Hz
- Bass check
- 10 kHz
- Clarity
- 15 kHz
- Air
How to use
Choose frequency
Turn the knob, use Min or Max, or pick a preset.
Select waveform
Sine is the clean starting point.
Adjust volume
Bring the level up slowly.
Press play
Play the tone and stop it when the check is done.
What is a tone generator?
A tone generator plays a steady sound at the frequency you choose. People use tones to check speakers, set levels, tune instruments, and compare what different frequency ranges sound like.
- Play tones from 20 Hz to 20 kHz
- Switch between sine, square, sawtooth, and triangle waves
- Runs in your browser
