Why does audio effect adjust volume on main audio track??? at DVinfo.net

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Old February 21st, 2010, 10:03 AM   #1
Regular Crew
Join Date: Feb 2008
Location: Staten Island, New York
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Why does audio effect adjust volume on main audio track???

I have a small problem. Just an FYI this does not happen when viewing the video in FCP in the canvass. This problem occurs after it is rendered either for DVD or the web(eg Vimeo).
The video is a boxing promo for a boxing match and it is edited to music. At 1:59 and 2:35 I have a camera flash effect used as a transition and at that point I use a Swoosh audio effect. You will notice that the volume of the soundtrack goes down. Can any one figure this out? Has this happened to anyone? How do I rectify this?
As I mentioned before this does Not happen in FCP watching it off the timeline in the canvass. The audio effect is on its own track. I do raise the db for the effect if that helps.
Here is the clip:

Any suggestions would be greatly appreciated.

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Old February 21st, 2010, 05:21 PM   #2
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Join Date: Dec 2005
Location: New York City
Posts: 2,645
Strange that the sound remains lower and gets lower with each swoosh effect. That's very unusual if you haven't placed any key frames in the music track. Make sure that you haven't accidentally placed key frame adjustments in the music track.

Placement of audio tracks is important, if only for organization. For simple projects I try to keep camera audio on tracks 1 & 2, music on 3 & 4 and extra effects on 5 & 6.

If the music track is clear of key frames, shut off the track with the swoosh on it completely. Render the sequence in Compressor (make an h.264 file or a DVD file using APple's presets) and see if the music track still dips. It shouldn't.

Turn the sound effects track back on and export a full resolution QuickTime file. Play that file in QuickTime, it should be OK. Render that file in Compressor using a preset. It should work fine.

I have created projects with all types of audio effects and never had this problem with renders.
William Hohauser - New York City
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