Hi Akihabara now supports the playback of your own mp3's or wav files! You'll find this feature under the single track menu, at the bottom. You need to know the BPM of your chosen file (beat detection is unfortunately quite hard to implement, and wonky at best). There are several guides on the interent for how to detect the BPM of a track though. Currently working to improve the high score system, trying to device some way to save track name, and maybe have the online. Let me know if you have any suggestions.