I have a headset which is plugged in through USB. The microphone is broken, so I tried to plug in headphones to use as a mic. When I do this the input sound goes through an earpiece and not through the 'real' microphone. I played the sound back and I can actually hear myself talking, although it is bad quality and almost impossible to understand what I'm saying. I've tried with many different earphones I found lying around, but the same thing happens on them all.