Audio Stereo track gone

Working FCP3, Suddenly not able to put complete clip into timeline, only video and one track of audio. Second audio track has disappeared. Everything worked fine earlier, I did some audio filter work on a few clips but don't think that caused the problem. Also have an older audio clips where one track is ahead of the other by a few seconds and nothing I can do seems to bring them back together??

If you are talking about placing a clip that you know has both tracks into a timeline and only one track is coming is try this:
Make sure the track source dohickies for both audio tracks are connected to a destination track. They are the little square things on the left side of the track that look either connected or disconnected (look just to the right of the green audio mute buttons). Both need to be connected for both audio tracks to come in.
To deal with your mismatched audio try this:
The audio tracks need to be disconnected from the video and to be NOT a stereo pair. Try Shift + L to unlink the video from the audio, then Option + L to turn the stereo pair to dual mono.
Once the audio tracks are dual mono, you should be able to slip them back into sync.
Apply the toggles in reverse order to return the dual mono to a stereo pair and to relink the audio to the video.
cheers,
x

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