You could try an external microphone for the sound:
http://www.amazon.com/Olympus-145037-ME-51S-Stereo-Microphone/dp/B000BTAH62?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_search_detailpage
I have one but haven't had chance to try it out yet. Just be sure to get the correct cable to connect it. A...