The composer probably just used a modern DAW (Digital Audio Workstation) like Ableton/FL Studio/Cubase/etc. There was likely no particular soundchip, though the Nintendo DS did have a soundchip which was limited to 16 channels of PCM/ADPCM sound. Not the best chip ever, but it got the job done mostly. Thats not used for this song, though.
That is because in this video, the original chiptune music has been muted and replaced with its Original Soundtrack Edition version, which is not chiptune but imitates PS1 music
The composer probably just used a modern DAW (Digital Audio Workstation) like Ableton/FL Studio/Cubase/etc. There was likely no particular soundchip, though the Nintendo DS did have a soundchip which was limited to 16 channels of PCM/ADPCM sound. Not the best chip ever, but it got the job done mostly. Thats not used for this song, though.
That is because in this video, the original chiptune music has been muted and replaced with its Original Soundtrack Edition version, which is not chiptune but imitates PS1 music