audon-fe/src/assets/boop.oga

    Copyright: Lucas McCallister
    URL: http://www.freesound.org/samplesViewSingle.php?id=67091
    License: CC-BY-SA (relicensed with permission from author)

audon-fe/src/assets/message.oga

    Copyright: Ivica Bukvic
    URL: http://gnome-look.org/content/show.php/%22Borealis%22+sound+theme?content=12584
    License: CC-BY-SA