xsr requires:
xsr is a little program based solely on Xlib (so its fast and small)
that reads in audio data from the soundcard and displays it on the root
window in an entertaining and neat fashion. it also does fourier analysis
and looks really cool. it is fast enough to run in the background without
interfering with anything (takes 3.5% cpu on my P150). here's a screenshot.
download xsr here: http://synergy.foo.net/~john/computer/xsr/xsr.tar.gz
to build the program just type
make
and be sure to turn on audio input from the device you want to read from
with a mixer program such as xmixer (shown in screenshot.)
have fun feel free to email me at john@foo.net
if you like the program or are having trouble.