I'm using a Windows & Dual Quad machine.
Here's some more info. The *.mts files from Panasonec GH2 play fine in VLC and WMP. When I tested oher edited files, originating from mts files, and edited in PP-CS5.5 and exported as mp4 files, the audio and video in the mp4 files play just fine in Bridge CS6. Also the audio in mov and avi files play fine in Bridge. Just to see if it had something to do with the file structure on the capture card, I recorded some video with audio and played it directly from the capture card and the audio still wouldn't play. So, it appears that Bridge CS6 currently can't handle the audio in the Panasonid mts wrapper unless I were to transcode it to mp4 or mov, etc. I'm concerned that this might result in some loss of quality, possibly baloon file size, and waste more time than it's worth.
My work around to date is to associate mts files with wmp in Windows 7 (Control Panel\Programs\Default Programs\Set Associations) so that when I double-click on the mts files in bridge, both the audio and video will play OK in wmp and I can move forward.
Sounds reasonable. It is just so unfortunate that video is so loosely structured. Even if an .avi it can have many different types of video under the wraper. Requires more codecs. Kind of like camera raw, every camera model has there own standards.
FYI I have my video set to open in VLC. But CS6 does play a few more formats than CS5.
I'm importing AVCHD (.MTS) files from a Panasonic HDC-TM700 and the files play back with audio in both WMP and Premiere CS6 but in Bridge CS6, there is no audio. Its unfortunate - I guess I'll have to wait for an update to Bridge, and in the meantime I'll use your workaround.
I wonder if there is any advantage to importing the files using Bridge VS. the Panasonic program that came with the camera (HD Writer AE) VS. copy/paste Windows Explorer...>?