> > What I'm hoping for NES is to implement an ability to use your actual microphone to > > take out Pol's voice from Zelda which was taken out from the US Version. > > I've always kind of wondered how that mic worked. Was it a simple on/off like a > button, or could the system actually get audio from it? It seems like a real A/D > converter would have been a frivolous expense, but maybe that was part of the reason > it got cut?
There was no ADC, as far as the CPU was concerned the microphone was just a button, but the microphone input did get mixed into the audio output from the console.