linuxmint/Cinnamon — pull request #2782 by gillesdemey (2013-12-28 17:59:42+00:00)
Title: Adding high resolution cover art for Spotify

All we need to do is change the original url (http://open.spotify.com/thumb/) to one the has one of the following sizes: 60, 85, 120, 300, or 640 so it becomes http://open.spotify.com//

300 seemed most appropriate for the Sound applet.

In addition it also removes the Spotify watermark.