no audio when play avchd file

There were no results for I’m new to Adobe, I’ve been an Avid editor for years and just switched from Avid MC6 to Premiere cs6. I’m on a MacPro with 16 gigs of ram and NVIDIA Quardro 4000. For some reason when I load an AVCHD file, the pic plays fine but no audio. If I scrub it for about 10 min. it starts playing sound. Can’t figure this out.

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