Waterfall spectral analyzer

Current spectrum and recent spectral history, evaluated locally in Python WebAssembly.

Choose audio Für Elise · loops continuously

Spectral resolution 2048 samples · 21.5 Hz Time resolution 10 spectra/s Color minimum −100 dB Color maximum −20 dB Time minimum −30 s Time maximum 0 s

Python spectrum function

NumPy compiled to WebAssembly · runs locally

Starting local Python WebAssembly…

Current waveform

Time-domain analysis frame

Current spectrum

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Spectral history

plasma · −30 s to 0 s

−20 dB

−100 dB