Voice/Sound problems

I installed the game and it's working good so far.... except for one thing. Each time someone tries to Talk to me, they get 1/2 way through what the text box on screen says but never get a chance to finish it before they get cut off and the next guy starts talking.

For example, if you're supposed to hear:

Person 1: "Welcome to the game. We hope you enjoy the experience."

Person 2: "You will begin your journey on the docks. You need to go meet Joe first thing"

You'll hear:

Person 1: "Welcome to the game. We hope you en.."

Person 2: "You begin your journey on the docks. You nee..."



The whole intro to the game where they're giving background I can't understand because I can't hear everything they're saying or read fast enough to get a grasp of what's going on.

Any suggestions on what I can do to fix it?

thanks