Mike Koenig - Soundbible.com - Attribution 3.0
Beach Wave.mp3 - http://soundbible.com/338-Beach-Waves.html
Sea Waves.mp3 - http://soundbible.com/885-Sea-Waves.html

Qat - freesound.org - CC0 (Public Domain)
whack01.mp3 - https://www.freesound.org/people/Qat/sounds/114682/