* Fade functions icons from Qtractor - http://qtractor.sourceforge.net/qtractor-index.html
    * icons/lisp/16/fadein-linear.png
    * icons/lisp/16/fadein-quadratic.png
    * icons/lisp/16/fadein-quadratic2.png
    * icons/lisp/16/fadeout-linear.png
    * icons/lisp/16/fadeout-quadratic.png
    * icons/lisp/16/fadeout-quadratic2.png

* Numix Project icons - https://numixproject.org - https://github.com/numixproject
    * /icons/numix/

* Based on Numix Project icons:
    * /icons/lisp/scalable/auto-follow.svg
    * /icons/lisp/scalable/auto-next.svg

* All the not previously specified icons are part of Linux Show Player
