Deadbeef it is one of my favorite audio players when in GTK environments. The icon Deadbeef It cannot be uglier, at least on the tray it is ugly, ugly, but ugly. The idea is to bring this:
to this (look at the left side of the Choqok icon):
Doing that is simple. We just have to open Deadbeef and go to Edit »Preferences» Plugins »GTK2 user interface» Configure »Custom status icon and put the name of the icon that we want, for example amarok which is the icon that you see in the image.
Of course, the name has to be from an icon (without the extension) that is available in the icon theme that we are using by default. Also, as is logical and if you prefer, put an icon that identifies an audio player (ex: amarok, rhythmbox, banshee, audacious).