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Old April 18th, 2010, 12:37 AM   #1
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Audio Cross Fade is Failing?

I'm going crazy, and I'm not sure if it's user error or a glitch in my system. But every time I add a cross fade(0 db), trying to connect the audio between two clips, it adds this annoying click sound, one which isn't there if I remove the crossfade.
It's almost as if it simply extends my audio clip and overides the cut I had placed earlier, just to fade, and some sound which I had previously edited out is working it's way back in.

Anyone have any idea what's going wrong?

Thanks,
-Cole
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Old April 18th, 2010, 12:55 AM   #2
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FCP WILL extend the audio by half the length of the cross fade to complete it.

If your cross fade is 1 second in a 29.97 timeline, 15 frames will be added after the cut to the outgoing clip and 15 frames will be added to the incoming clip in order to cross fade them.

Addendum: This ASSUMES the Cross Fade is CENTRED on the cut.
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Old April 18th, 2010, 01:21 AM   #3
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To further explain, see the attached screen captures.

The first shows the first step - two clips back to back - note the cut lines up with both audio & video

The second shows the second step - the application of a 1 second Cross Fade - notice how the marker extends over both sides of the cut, showing the duration of the extensions.

The third is what one would do with the volumes in order to achieve the same effect - notice how both clips extend past the cut.
Attached Thumbnails
Audio Cross Fade is Failing?-1.jpg   Audio Cross Fade is Failing?-2.jpg  

Audio Cross Fade is Failing?-3.jpg  
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Old April 18th, 2010, 04:41 PM   #4
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Thanks for the explanation. I guess that means, I needed to hold the shot longer before yelling "Cut"... I'll have to see what I can do to "band-aid" it for now.
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Old April 18th, 2010, 06:09 PM   #5
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The standard "go to" solution for fixing audio "oops" is to record 1 minute of room sound with everything and everyone in place so that one can graft in "silence" in order to accommodate changing sounds from scene to scene and clip to clip. try and find a 1 second spot of "silence" in your clip around that point and place it where you need the "silence" and fade it in SLIGHTLY ahead of the cut point and then cross dissolve to the new audio.

And yes, a good director knows (learns...) to keep his yap SHUT for a good couple of seconds after the performance is over to keep the audio editable. Post roll is as important as pre roll.
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