Spectrogram

This article is a stub. You can help the Hydrogenaudio Knowledgebase by expanding it.

A constant-Q spectrogram of a short segment of a song.

A spectrogram is a graph showing the distribution of energy between frequency bands over time.

The data that is necessary to create such a graph is gathered by transforming time domain (PCM) data to frequency domain, e.g. using FFT.