Icons:
 - pause by Nawicon from <a href="https://thenounproject.com/browse/icons/term/pause/" target="_blank" title="pause Icons">Noun Project</a>
 - Mute by Nawicon from <a href="https://thenounproject.com/browse/icons/term/mute/" target="_blank" title="Mute Icons">Noun Project</a>
 - volume up by Nawicon from <a href="https://thenounproject.com/browse/icons/term/volume-up/" target="_blank" title="volume up Icons">Noun Project</a>
 - menu by Nawicon from <a href="https://thenounproject.com/browse/icons/term/menu/" target="_blank" title="menu Icons">Noun Project</a>
 - square by Nawicon from <a href="https://thenounproject.com/browse/icons/term/square/" target="_blank" title="square Icons">Noun Project</a>
 - triangle by Nawicon from <a href="https://thenounproject.com/browse/icons/term/triangle/" target="_blank" title="triangle Icons">Noun Project</a