A speaker can be a microphone with zero hardware modifications. Not an especially GOOD microphone, but if they've set up the electronics to listen as well as to make sound, it'll work as one. Any speaker can be a microphone, and any microphone can be a speaker. They're just usually better at one task than the other.
If they wanted to put a microphone in the controller, they could just do it. It's not like it hasn't been done before. There wouldn't be any need to hide it.
[–] Fambida 0 points 5 points 5 points (+5|-0) ago
A speaker can be a microphone with zero hardware modifications. Not an especially GOOD microphone, but if they've set up the electronics to listen as well as to make sound, it'll work as one. Any speaker can be a microphone, and any microphone can be a speaker. They're just usually better at one task than the other.