Failed to play sound: Sound disabled ???

[abdelkader belahcene <abelahcene@gmail.com>]

 Hi,
I want to play sound  at login;
I installed canberra, it seems correct, until I tryed to test it with the command
canberra-gtk-play -f /usr/share/sounds/desktop-login.ogg
but it failed with error


Failed to play sound: Sound disabled  ???

very strange ; since I can here  audio file ??  the same file I can here it with another audio player.
thanks for help