Temporary sounds got from public domain sources on Internet:
http://www.partnersinrhyme.com/pir/PIRsfx.shtml

splash.ogg
http://sound-effect.com/pirsounds/PD_SOUNDFX/HOUSEHOL/DOORS/Knock.wav

beep-valid.ogg
http://www.sound-effect.com/pirsounds/PD_SOUNDFX/BEEPS/BEEPPURE.WAV

beep-select.ogg
http://www.sound-effect.com/pirsounds/PD_SOUNDFX/BEEPS/SONAR.WAV

start.ogg
http://sound-effect.com/pirsounds/PD_SOUNDFX/HOUSEHOL/Spray.wav

In the long run, these files with be replaced by Liquid War 6
dedicated audio files, but they allow for testing the sound API.
