I started a new game on my G73JH laptop, and lines of dialogue frequently cut out before they are finished. I googled the problem and it's apparently been answered here before, but the post has disappeared from the forums.
Asus G73JH-RBBX05
Radeon 5870
i7 720 @ 2.8 Ghz
Realtek Digital Output
I think this issue was meant to have been solved with 1.02 patch. Otherwise, you may want to change your hardware acceleration level for the soundcard, or ensure your CPU/GPU is not changing frequency/speed. Most of my Mass Effect 1 sound issues were solved by using a Creative X-Fi USB soundcard instead of the onboard.