Very lightweight, the whole thing downloads, compiles and runs almost instantly. After you go in the examples directory and run make, here's a little bash command to run and listen to each example in series while looking at its source:

  shopt -s extglob
  for f in ex_!(*.*); do ./$f; `play test.wav > /dev/null 2>&1 &`; less $f.c; done

ex_music is beautiful! But the source is not very expressive, even being familiar with DSP, a lot of the code has me guessing (well, it is expressive, but I guess the variable names are too short to my tastes).