For the correct output device, a clear recommendation.

I felt the HDMI connection between the computer and sound system for listening to stink normal Internet radio much too expensive. So I bought to my laptop via the headphone jack to the remaining free optical input of the system to connect this cable.
But be careful: the cable has no electronic logic. It converts the analog sound is not in digital. The output device must be able to send in digital self.
So from the MP3 player arrives at the pit Nothing. Of our three laptops only support two digital output and could, after I have chosen the digital sound output as standard under Windows, be heard over the sound system. The third party (a Sony Vaio) remains far silent. Fortunately, my laptop is a good guy, so the matter of Internet Radio now runs fine.
The material is high quality and the sound quality on the sound system very well.