Nintendo was too loving stupid to add support for the mp3 file that almost everyone uses and has on their computer, so I'm forced to convert all my mp3s into AAC if I want to listen to them on my DSi. I don't want to buy a converter, and I don't want trial software that will force me to only convert 20% of the file or something. I also don't want to use iTunes, I just got ituneshelper.exe to stop running at startup even after I got rid of iTunes.