Did you have a analog and digital out yes or no ?
If yes the analog out can be the input for a audio amplifier and loudspeaker box .
For instance from Logitech .
Using analog out that is the way I use it on my linux box .
It works perfect .
The digital out should be connected to a DAC + Audio amplifier + loudspeakers .
Most Apple people use APPLE TV or Airport Extreme to connect to external speakers .
Here is a article to trick Apple TV to run under linux http://www.chriscarey.com/wordpress/...running-linux/
As it a article from 2010 it is about Apple TV 1 .
It might be possible to buy it second hand .
If it works with Apple TV 2 I do not know .
But both Apple Tv and Airport Extreme needs a audio amplifier