Cool, so I guess the next questions are:<br><br>when, of course? Basically it should be right away (when QT6 is complete) because doesn't iTunes run off the QT engine or something like that?<br><br>And I wonder how it will work with existing mp3 files? That is, if you convert from mp3 to AAC would you lose quality, like sometimes happens when you recompress video to another format? It seems like that would be an important question considering how many mp3 files most people already have.<br><br><br><br>