If you hook something like this to the macbook, do you get the option of selecting an external mic? http://www.amazon.com/Logitech-3-5mm-Jack-Audio-Adapter/dp/

If you hook something like this to the macbook, do you get the option of selecting an external mic? http://www.amazon.com/Logitech-3-5mm-Jack-Audio-Adapter/dp/B0058P0I2C/ref=sr_1_14?s=electronics&ie=UTF8&qid=1327459565&sr=1-14 http://www.amazon.com/Logitech-3-5mm-Jack-Audio-Adapter/dp/B...