Use default music player in Dash
Solution 1:
Unfortunately at this time the music lens only supports Rhythmbox and Banshee. When 13.04 is released the music lens will support
Audacious
Clementine
Guayadeque
Banshee
gMusicBrowser
Musique
and
Rhythmbox
For more information please refer to http://www.omgubuntu.co.uk/2013/02/100-scopes-list-ubuntu-13-04