Thanks Bill,
Your answer does help.
I thought there might be a difference in how good a player "translates" the music file into the digital audio output signal.
Being very happy with the sound of my DAC, I am thinking of buying a Hama DIT2000 network player, because of its price and positive user reviews: easy to use, good display (Instead of a Pioneer n-p01). It should replace my old Noxon Audio 2 network player.
I mainly use it to play music from my NAS and a few Dutch network radio stations....
Peter