In order to make the Benchmark Dac work, I had to log into the Odroid via ssh at a terminal window. I then executed the „alsamixer“ command to get the alsamixer window where i then had to unmute the outputs.
UPDATE: I was able to figure out that Unbutu mutes the output of all soundcards by default. I lauched a terminal window from the Unbutu desktop and used alsamixer to unmute the sound card. Now I have sound!
Unfortunately, rebooting Unbutu resets the mute.
I think there is an alsa command I can place in squeezelite confuguration option but I cannot seem to figure out the syntax.