As previously reported, MP3 Play for the Nintendo DS is a media player that will allow you to play MP3's from your flash cart. This Mp3 Player offers such features as, Playback time and time indication of the mp3 file, ID3 tag interpretation and Japanese file name indication correspondence (UNICODE). In the most recent update, the author Sata has introduced "the FAT library which corresponds to M3 SD experimentally." Be sure to check his site for many other great applications such as NDS Memo and the NDS EPROM Tool.