IMovie HD sound gets distorted

I have a few teachers who have made iMovies using iMovieHD. When you play the movie in full screen mode after about 5 minutes the sound gets distorted. I thought that this was just an isolated incident and that the movie was corrupt, but now I have two teachers, two computers same issue.
These are being done on MacBooks 10.5.6 with 1G RAM and they have not been converted to quicktime yet. Since iMovie HD is easier for my staff they use it rather than new '08 7.1.4.
Is that the issue?

Hi
a. What kind of audio used ? .aiff, .mp3, from iTunes etc.
b. Any external hard disk used ? Formatted as ? USB or FireWire ?
else General troubleshooting list.
*Not knowing the origin to Your problem - General approach when in trouble is as follows:*
• Free space on internal (start-up) hard disk if it is less than 10Gb should rather have 25Gb
• Hard disk is untidy: Repair Permissions, Repair Hard disk (Apple Disc Util tool)
• Garageband-fix. Start it and Close it. Re-try
• Delete iMovie pref file - or rather start a new user/account - log into this and re-try
iMovie pref file resides:
Mac Hard Disk (start-up HD)/Users/"Your account"/Library/Preferences and is named: com.apple.iMovie.plist
While iMovie is NOT RUNNING - move this file out to desk-top.
Now restart iMovie.
• Third party plug-ins that doesn't work OK (not relevant for iMovie’08 or 09)
• Program miss-match: iMovie 5.0.2, up to Mac OS X.4.11 AND QuickTime 7.4.1 - is OK
• Program miss-match: iMovie 6.0.3 or 6.0.4, Mac OS X.4.11 AND QuickTime 7.4.1 - is OK (might work under Leopard)
• Program miss-match: iMovie’08 v. 7.0.1, Mac OS X.4.11 AND QuickTime 7.4.1 - is OK (might work under Leopard)
• Screen must be set to Million-colors
From LKN 1935: (in this case = iMovie HD (5), I tried it all, but nothing worked.
Your answer (above) has been helpfull insofar as all the different trials led to the conclusion that
there was something wrong with my iMovie software. I therefore threw everything away and reinstalled
iMovie from the HD. After that the exportation of DV videos (there has not been any problem with HDV videos)
to my Sony camcorders worked properly as it did before.
Yours Bengt W

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OK Imagine that Connection speed from your ISP is like an empty freeway. You can go full tilt (upto that road's speed limit)
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Release the keys.
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Open
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Ok
here goes.
You need onyx software for this..
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ok, this may be super simple but i just can't figure it out!
i import movies and they sound great, but *whenever i have to adjust contrast or add subtitles* they sound gets all weird and you just can't understand a thing!!
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HELP!

Hi
There are many who has problems with audio and mainly transitions in iMovie HD 6.
Origin: Unknown to me
Work around:
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A Working solution
IF NOT:
Not knowing the origin to Your problem - General approach when in trouble is as follows:
• Free space on internal (start-up) hard disk if it is less than 10Gb should rather have 25Gb
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• Program miss-match: iMovie 6.0.3 or 6.0.4, Mac OS X.4.11 AND QuickTime 7.4.1 - is OK (might work under Leopard)
• Program miss-match: iMovie’08 v. 7.0.1, Mac OS X.4.11 AND QuickTime 7.4.1 - is OK (might work under Leopard)
iMovie pref file resides: Mac Hard Disk (start-up HD)/Users/"Your account"/Library/Preferences
and is named: com.apple.iMovie.plist
While iMovie is NOT RUNNING - move this file out to desk-top.
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Yours Bengt W

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