All the calls I make on skype sound like a Stephen Hawking's voice, but broken up, so the sound is totally incomprehensible. this happens at both ends. ie, if I make a skype call to a landline, I can't decipher what's being said to me, and the person at the other end can't decipher what I'm saying either. This has been going on ever since I got the macbook in July last yaer. I have a macbook air, MacOSX10.7.5, and Skype 18.104.22.1687. Does anyone have any ideas on what I can do to make it work?