Spectutils is a software package for creating spectrogram plots of audio signals. Spectutils contains a set of subroutines for [Gnu Octave](http://www.octave.org/) and a set of Unix/Linux utility programs for sound file preprocessing.
For an introduction to Spectutils, see the DAFx-08 conference paper: [http://www.acoustics.hut.fi/dafx08/papers/dafx08_49.pdf](http://www.acoustics.hut.fi/dafx08/papers/dafx08_49.pdf). Also, an online tutorial is available here.
