URL
http://incompetech.com/music/royalty-free/collections.php
https://soundcloud.com/groups/creative-commons
使用する際は以下のようなテキストをreadmeファイルなどに添付する事
Title Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/by/3.0/