So...
After all the ordered components arrived, I tested the whole thing.
I can tell you one piece of good news and one piece of bad news.
First the good news:
The Samsung Soundbar can be controlled via the Sonos port using a digital converter (digital cinch / optical cable) and plays the selected music.
Converter:
Oehlbach DIGICON C/O - DIGITAL ELECTRICAL-OPTICAL AUDIO CONVERTER (Digital -> Digital)
The bad news:
If you have other Sonos components in use, like I do (3 x SONOS One 2nd Gen.), you will hear an audio delay on the soundbar, which unfortunately cannot be adjusted. It's about 25-50ms, which almost drives me crazy (Yep, I'm a monk). Unfortunately for me this is not an acceptable solution and the port is going back. The delay is probably coming from the converter. The digital RCA output unfortunately cannot be adjusted in any way. Only the inputs allow audio delay.
