Audio glitch then freeze during Priority: The Citadel

My ME3 game stops verbal audio (sound effects and music still work) during the sequence while meeting Kai Lange the first time (when he's about to attack the Counselor and before you go after Udina), and at the end will freeze and not load to continue playing.  I've tried restarting the whole system, cleaning my disk (which is in mint condition), and verifying everything is plugged in appropriately.  Has anyone else has issues like this?  Any resolutions?  Thanks!