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Spectrum

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AudioEngineering AudioVisualisation

A spectrum shows the frequency content for an audio signal. A frequency-domain visualisation.

A spectrum can be for a point in time in an audio signal, or for the entire audio sequence.

In Audacity, you can generate a Spectrum via Analyze > Plot Spectrum.

Audacity's Frequency Analysis window showing the spectrum of an audio clip, with amplitude in dB against frequency on a log scale from 50 Hz to 20,000 Hz.

Screenshot of the Plot Spectrum window in Audacity.