KazoWAR updated “NDS Music Player”. It’s based on fincs’ SSEQ Player and allows to play music tracks from commercial games with a GUI browser pointing at the desired ROM file.

NDS Music Player Update

Changes:

– Automatic play mode added. Push select to enable/disable it.
– Track Fadeout option added. Push Y to make it happen. (Will also happen in auto-play mode after 2 loops of a given sequence.)
– File names with special characters, like Pokémon, no longer cause problems for SPS Maker.
– Pause mode added. Push Start to pause/resume a given sequence.

http://gbatemp.net/t306997-nds-music-player