Tone & sweep generator
Generate a test tone or a frequency sweep for calibrating speakers, headphones or a room. Playback is faded in and out, and the master level is capped at -12 dBFS.
Signal
Slide through a frequency range instead of holding one tone.
Result
Set a tone and generate it to preview and download. Nothing plays until you press play.
The tone is synthesized in your browser and exported as a 16-bit WAV. No upload, account or credits are involved.
Good to know
Tone & sweep generator
Create a known sound before you investigate an unfamiliar one. The tone generator produces a chosen note, a frequency in hertz, or a sweep you can listen to and save as WAV. Use a sine wave as a simple pitch reference, then compare richer waveforms to hear how harmonics change the timbre. A short sweep can support a controlled playback experiment, while white noise provides a broad signal for comparison. Everything is generated in your browser. Start with low device volume and a short duration: the digital level limit does not measure the sound pressure at your ears. This tool supplies test signals; it does not diagnose hearing or automatically calibrate a room.
What each setting does
- Pitch and waveform
- Choose a note and octave or 20–20,000 Hz, then select sine, square, triangle, sawtooth, or white noise.
- Duration and level
- Set 0.1–60 seconds and a level up to −12 dBFS. Short fades soften the beginning and end.
- Frequency sweep
- Set start/end frequencies and a linear or logarithmic curve. A periodic waveform is needed to hear a changing pitch.
Lower your device volume, choose a sine wave, and set a note or frequency.
Choose a short duration and low level; enable and configure a sweep if needed.
Generate, preview briefly, and download the WAV once the signal matches your experiment.
A few useful answers
Their harmonics differ. A sine wave is the simplest reference; square and sawtooth waves contain more upper-frequency energy.