Very choppy audio when listening to audio screenshare

 I attend meetings often and sometimes I need to listen to audio screenshared from other people. The sound from the screenshared videos is very choppy and sometimes extremely muffled (the visual portion runs smoothly). About one in every four times there's no audio at all. I've checked to see if my drivers are all up to date - they are. It's a 1 1/2-year-old computer running Rectify11 with plenty of RAM. I've never had this problem before on any other computer. Any suggestions?

Thanks in advance,

Zack

P.S. I've had this problem for a while now.