The most common cause for Audio to become truncated, i.e. drop-out at a certain point, is a failure to Conform the Audio 100%.
However, this can occur, when one Imports an AV file into Premiere. I have never read of it happening in Organizer, so am stumped as to what would be happening there.
For more info on Conforming Audio, see this article, but I do not know how it would apply to Organizer, which just reads the file from the HDD: http://forums.adobe.com/message/3892177#3892177
I hope that others have something more useful to offer.
I realize your interest in the Organizer for tagging your files. But from a troubleshooting perspective, I would ask:
If you import any one of these files in question from its hard drive save location into Premiere Elements 11 Mac using Add Media/Files and Folders/Project Assets and dragging the file to the Timeline Expert view, can the video on V1 be seen and the audio on A1 be heard without issue?
You offer that you are working with standard and HD footage from a Panasonic camera. Could you please tell us the video and audio properties of these files involved as well as their file extension? What is the duration of a typical file that will not play back in the Organizer?
What players do you have installed on your computer with Premiere Elements 11?
Let us start here and then review the situation.
Thanks, ATR. In answer to your first question -- yes. If I import something directly into Elements from a file on the hard drive, in expert view, the V1 and A1 are fine. I just tested it with a 28MB clip in .mp4 format (873X480) shot with a Panasonic SD camcorder -- duration 1:02. The audio drops off a little over half way through. The same thing happened with a HD clip from a Panasonic HC-V520 in .mts format over 5 minutes long. The audio dropped off in that clip after about 3 minutes. The players on my computer -- Adobe flash player; Quicktime; MPEG Streamclip. Elements seems to prefer the flash player, while Final Cut Express prefers the MPEG Streamclip. Quicktime will play most formats but not .mts. I've ruled out camera error of course. I might add that this does not happen with every single clip. I was just tagging some .mp4 clips from 2012 and I went through 4 clips until I found one where the audio was dropped -- the one mentioned above. I hope this info helps. It's really frustrating.