I then read and found that the generic driver of Win7 support / 8 only analog output me a little clever.
For digital (Toslink) tone you need the appropriate drivers - with me the Win8 driver did not work, but the Win7 (64 bit (googling for CMedia cmi106 win7 64bit)
The drivers for Win7 64 bit I have a 5.1 signal via Toslink. Of course, under "Sound" the digital audio device is selected and the VLC player the checkmark SPDIF -If had available - are set. With the Win8 drivers worked Toslink far (yet).
The sound card sounds satisfactory to good: I would compare the sound with a good on-board solution.
In summary, I would recommend this product if you are a little familiar with the sound setup and drivers.
I hope that my report was helpful to you.