Go to download.com and find the K-Lite Codec Pack_Full and install. It seems that the new updates have been messing peoples system's ability to read Codecs. This fixed my problem and I've been searching all day every day for over a week now.
I find it hard to believe that this fixes the root of the problem as the same files playback fine in CS6. CS6 and CC 2014 should be referencing the same codec library on my system, right? If this is the case, then there is something wrong with how CC14 is decompressing the footage with the codecs that are working fine in CS6.
To further this point. I imported the same files into CS6. CS6 played them back fine, so I saved the session and opened it up in CC14. CC14 converted the project file and all media loaded and plays back normal now.
So if this is a codec issue, it would not have been solved by opening the files first in CS6. It also would not be solved as so many others report by moving the files and relinking to the new folder. It seems to me to be an import issue that is solely in CC14, not CC or CS6.
I have the same problem here, have had it for a year. Video fine, Audio bad on the .MTS files imported from camera card without any transcode. Only workaround I found is to open the files in Final Cut Pro (sigh) Log and Transfer to Apple Pro Res and reimport those into PPRO CC 2014. The Canon C100 is a popular camera with, what I would assume, is a standard AVCHD codec structure and file scheme. So why the audio is being scrambled I don't understand.That said, I've had SOME files audio tracks work fine with the C100, while others do as you explained: and glitch the audio, skip, are totally out of sync or silent then out of sync. This is reflected in the waveform also. So far I cannot figure it out. These are being shot in 1080p 30. Both Quicktime and Final Cut have no issues with the same clips. This is with the latest OS, CC updates and firmware in the C100. Same problem in Media Encoder, if I export files from encoder, they are also audio glitchy.
Thanks For Any Suggestion.