The sound effects are copyrighted by Jim Toomey, and are 
extracted from the screensaver "Sherman's Lagoon".

The original sound files are in WAVE format, but since most
people have a command line mp3 player and no command line wave
file player, I've converted them to mp3s, using LAME 3.92.

lame -m a --r3mix -q 9 -v -c -p --tt "Many bubbles" --tc \
"Copyright by Jim Toomey" manybubbles.wav manybubbles.mp3

For those of you that dislikes mp3s for various reaons
and prefer oggs there are ogg files too.

oggenc -q 7 -t "Prey death scream" -c "Copyright by Jim Toomey" \
deathscream.wav