As I know Nintendo DS use 3 kind of music format - AHX, STRM (they are nonsynth) and SSeq (synth). KitN uses SSeq (except of 4 tracks). I grabbed SSeq files and import game music instruments so their sound is almost the same as in the game. If you hear them as dull midi then you use bad player.
Upd: It's an example of correct player -
ExampleThis post has been edited by Deathless: Sep 27 2008, 10:36 AM