The 160Kb VBR sample scored best overall. Why is this? Some hinted this, but nobody really pursued this logic: If you compress something, you lose information. If you lose information, the information that remains becomes more prominent. What if the info remaining in the 160Kb VBR experiment just happened to catch the essentials of the song? In other words, another song with the same collection of bit rates might produce another "best" sample, because the information remaining may be best suited for that song. If this is true, experiments like this are totally futile, because they cannot show a best bit rate in general (only for a particular song). I scored 160kB VBR better than the 320kB CBR and about equal to the uncompressed CD.