uuuups!
my posting was under the assumption that we are talking about and raspi running with linux.
I re-read your post and of course you talking about an Intel NUC. From some pics on the internet it seemed that it has and 3.5mm audio connector.
Just for the case that this is right and the box is also under linux, my previous posting may still be valid.
Otherwise, just ignore!
Regards
Stefan