Can you please paste here the output of the following commands:
apt-cache policy libcanberra-gtk0
apt-cache policy libcanberra-gtk3-0
apt-cache policy gir1.2-gtk-2.0
Can you please paste here the output of the following commands:
apt-cache policy libcanberra-gtk0
apt-cache policy libcanberra-gtk3-0
apt-cache policy gir1.2-gtk-2.0