Just got an Xbox One and I tried Chat within Titanfall. With the headset plugged into the controller I can hear no other players and the mic does not seem to be doing anything, I do not have a Kinect. The Mute switch on the headset does not seem to do anything. Any trick to using chat ?
Also, check your xbox profile settings. If you setup as a child account, all chats are automatically disabled unless it is from your friend's list. I actually purposefully set my account to this so that I don't have to listen to all the teenagers and kids whining and adults cussing.