Inspect the amplitude spectrum of a generated signal or a local WAV file.
Input signal
Audio stays in your browser and is not uploaded.
SourceGenerated sine
Peak—
Resolution Δf—
Nyquist—
How to read the spectrum
The FFT separates a finite time record into frequency bins. Frequency resolution is Δf = fs/N. Windowing reduces leakage at the cost of a wider spectral peak; flat top is useful for amplitude estimates, while Hann is a robust general-purpose choice.