Make spectrograms

Synopsis

spectgen is used to create spectrograms, which are 3d plots of amplitude against time and frequency. Spectgen takes a waveform and produces a track, where each channel represents one frequency bin.

By default spectgen produces a "wide-band" spectrogram, that is one with high time resolution and low frequency resolution. "Narrow-band" spectrograms can be produced by using the -shift and -length options.

Typical values for -shift and -length are:

Options