First of all this is more along the lines of a "thought experiment" then actually suggestion this be implemented. But assuming we already have some kind of ddr pad for nes (powerpad? Anyway that's besides the issue). Wouldnt it be possible to make a cart that hooks up to an mp3 player. Now the idea is that the left channel of the songs on the mp3 player contain a mono version of the song you want to play. Now the right channel would have the actual arrow data implemented. Similair to how data used to be stored on casettes. The only thing I can't completely think up is how you would time everything as the arrow has to scroll up of course after its been told to been drawn by the mp3 player signal...but that might lead to irregular timing...any thoughts on that?
edit: for clarity the data would be mixed in similair to how famicom extra audio works.
edit: for clarity the data would be mixed in similair to how famicom extra audio works.