As if there weren't plenty of ways to mod that old DS Phat of yours already, someone has figured out a little trick that allows you to use it as an extra pair of speakers. Using a line-in cable and his DS Lite as an audio source, GameTrailers user (and avid site reader) MaHe1 manages to bust out the mp3s while playing a little Mario Kart DS. Hmm, we wonder where else he could play Mario Kart DS ...