$ sudo apt-get update
$ sudo apt-get install eiskaltdcpp-sounds 

eiskaltdcpp-sounds is installed in your system.

Make ensure the eiskaltdcpp-sounds package were installed using the commands given below,

$ sudo dpkg-query -l | grep eiskaltdcpp-sounds *

You will get with eiskaltdcpp-sounds package name, version, architecture and description in a table

eiskaltdcpp-sounds package basic information: