For the Famicom, there are some games that support the microphone, such as Zelda no Densetsu (Japanese “The Legend of Zelda 1”), which allows you to instakill a room full of those annoying bunny things by making a noise in the mike.
Could there be microphone functionality added? Maybe it could be mapped to a button. I can’t do it myself because I do not have the available time or technology, and I don’t have nearly enough technical know-how. Could someone add the microphone to the Japanese-region NES games being emulated through this site? Thank you and have a nice day!