The price is OK but unfortunately the volume is too low that I have to turn on my Yamaha Anlanger, which unfortunately has only one analog input, much louder than other sources. In silence you already hear then the amplified noise.
I now have the expensive equipment from Oehlbach ordered and will test it.
Update: The Oehlbach Converter is really minimal louder. However, just seems to be too low the audio output from the Samsung TV. I buckle the converter to the Toslink my PC on, the volume is optimal.
Therefore, there is now also a 4 star because the converter can not help it if he gets too faint signal.
Solution volume problem:
The only solution was for me that I have the level translator 100 AHV worried me from ELV as a kit. This is connected downstream of the D / A converter. The analog output signal is amplified to an adjustable level. Now everything is finally good.