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Spectrum Analyzer
Live FFT visualization with numeric level and peak frequency.
Microphone required after you click Start. Audio is processed locally โ nothing uploaded. Numeric readouts supplement the spectrum canvas.
Level
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Peak
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Canvas shows relative amplitude by frequency bin. Values above are numeric alternatives.
FFT visualization
The analyzer performs a real-time FFT on microphone input. Bin width depends on sample rate and FFT size (~30 fps).
Latency note
Browser buffering adds delay unsuitable for precision timing โ fine for visual monitoring.
Performance
Rendering pauses when the tab is hidden. FFT size is reduced on narrow screens.
How to use
Adjust settings
Use sliders and controls to set frequency, volume, and waveform. Changes apply in real time.
Export or share
Download a WAV file or copy a share link. All processing stays on your device.
Frequently asked questions
Does this work without a microphone?
This tool analyzes mic input.