Spectromatic
It's very easy. First make sure you have the GNU scientific library (GSL) version 1.0 installed (http://www.gnu.org/software/gsl/), and the PNG library version 2 or later (version 3 is untested, but should work - version 1.x may also work) plus the development versions of these libraries (i.e. the header files etc. - Debian calls these packages libgsl0-dev and libpng2-dev). If you wish to change the default installation directory, edit the Makefile. Then type "make" followed by "make install". Easy!
Using it may be a bit harder. Refer to the man page for detailed instructions, but basically:
- get a 16-bit mono or stereo wave file
- spectromatic file.wav
- this generates file.png which is the spectrogram. There are lots of options to change the way it generates the image (I recommend spectromatic --inverse --logarithmic --combine LXR file.wav).
Enjoy!
- Daniel Franklin (d.franklin@ieee.org), 31st March, 2002