Amarok Runner
http://www.kde-look.org/content/show.php/Amarok+Runner?content=109120

    With that KRunner plugin you are able to command Amarok through
    KRunner.The supported actions are: Play, Pause, Stop, Louder,
    Quieter, Volume=XX, Next song, Previous song, Quit, Mute.
    The commands have got other identifiers, they can be looked up in the
    configuration dialog but the identifiers are changeable.