Has ther been anything published in recent years that addresses actual listening comparisons between MP3 and CDs? I'd prefer they have split the panels' sources into those that are acoustical (i.e. begin by pushing air)from those which start by exciting electrons. It would be helpful if those doing the reacting were identified as professional or casual listeners as well.
I 'm not looking for indivual reactions in print but a designed and controlled test. Anything out there?