I have an Acer Aspire E15, and it has a single jack. Im not sure if its a combo jack, but whenever I plug something in it gives me options such as Line In/ Mic In/ Headphone/ etc. So I have this audio splitter (2 female to male), and I plugged in my headphones in the audio output, and a dedicated mic I have into the input jack. But whenever the options for which device I plugged in, none of the options seem to work. I get output, but I never get any input from my mic. Is there something i can do? The only other time i get any input is when I have it set to speaker or headphone, but that uses the external mic on the laptop.