I did a double blind test and picked 10 out of 10 correct comparing mp3 at 128 to 320 to wav, the difference was always obvious in every case. What do you expect? Even at 320, 75% if the encoded information is just gone. But I guess the whole issue really only matters to people to whom it matters. Most have never heard music played properly so they don't know the difference. Maybe ignorance is bliss in this case, hearing my college roomie's Quad setup in the 80s sent me on a very expensive and sometimes frustrating ride.