Set the sweep range
Choose start and end frequencies from 20 Hz to 20 kHz. Reverse the values to create a descending sweep.
Online Frequency Sweep Generator
Create a linear or logarithmic sweep between any two audible frequencies. Test speakers, locate resonances, visualize the sweep, and export it as WAV.
Browser generatedLive spectrumWAV export
Ready20 Hz
Channel
Start low. Pure tones and noise can be uncomfortable or damage hearing and equipment at high volume.
Live output spectrum20 Hz20 kHz
Press play to inspect the generated signal10% output
Signal, clearly explained
Generate with intent.
Use the controls above as a test source, then open the main analyzer when you want to inspect a recording or microphone input in more detail.
Open Spectrum AnalyzerChoose linear or logarithmic
Linear sweeps cover equal numbers of hertz per second. Logarithmic sweeps spend more time in lower octaves and are often easier for audio testing.
Watch for resonances
A sudden change in perceived loudness may come from the speaker, headphones, room, or your hearing—not necessarily the generated signal.
Before you press play.
What sweep should I use for speakers?
A low-volume logarithmic sweep from 20 Hz to 20 kHz is a useful starting point, but consumer playback devices may not reproduce the full range.
Can the sweep run downward?
Yes. Set the start frequency higher than the end frequency.
What does Repeat do?
It starts the same sweep again after it reaches the end until you press Stop.