Nintendo DSi + Korg DS-10 + Formant Synthesis come together to on Denkitribe's fan version of Daft Punk's Harder, Better, Faster, Stronger.
Formant synthesis uses resonance, at specific frequencies, to shape sounds. The most common application of this is vocal synthesis, as shown here.
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James Lewin
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Older Music Machines & the People Who Still Use Them