I am trying to record music at home. I am using an Asus laptop with the combined headphone / mic jack. Which, from my research, can also be used as a "line-in" stereo input, correct? Well anytime I plug the cable coming from my mixer/pa into the laptop it asks me what I plugged in and gives me three options. Headphone, speaker out, or headset. Its none of those. I am trying to use the jack as an input, which it is as well as an audio out. How do I do this and why am I only getting those three options?