I'm having a problem where audio randomly drops out during playback of videos in the viewer. I'll be watching a video clip, and then out of nowhere the audio will just stop. Sometimes if I click stop and play again, the audio returns. Sometimes the audio never comes back until I restart the program even if I change video clips. I never have this problem when viewing sequences though. It only happens when I'm previewing clips before adding them to my sequence so when it gets really bad I end up adding all the potential video clips to the sequence before trimming and arranging them just so I can hear the sound.
This consistently happens to me on my Macbook Pro and my Windows 8 PC both running the most up-to-date version of Premiere Pro CS6. All of the video content I'm working with is in AVCHD format. The Macbook is a 2008 pre-unibody model with OS 10.8, 4 GB RAM, a Intel Core 2 Duo 2.2 GHz processor, and an NVidia 128 MB video card. The PC is running Windows 8 with 16 GB RAM, a 2 GB video card, and an Intel I7 processor with 3.4 GHz.