$ sudo apt-get update
$ sudo apt-get install banshee-community-extensions 

banshee-community-extensions is installed in your system.

Make ensure the banshee-community-extensions package were installed using the commands given below,

$ sudo dpkg-query -l | grep banshee-community-extensions *

You will get with banshee-community-extensions package name, version, architecture and description in a table

banshee-community-extensions package basic information: