The sound files KFW/SOUND/601*.WAV were edited from https://freesound.org/people/Fight2FlyPhoto/sounds/161101/ by Fight2FlyPhoto, relased under Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0). A copy of this license is available in KFW/LICENCES/CCBYNC30.TXT
The sound file KFW/SOUND/WARNING.WAV was edited from https://freesound.org/people/SpliceSound/sounds/369879/ by SpliceSound, relased under CC0 1.0 Universal (CC0 1.0) Public Domain Dedication. A copy of this license is available in KFW/LICENCES/CC010.TXT
The rest is relased under Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) A copy of this license is available in KFW/LICENCES/BYNCSA4.TXT