Weird audio behavior

I have a macbook (2008) and I am using Dr. Bott Mini DisplayPort-to-HDMI Adapter Pro with optical audio to watch media on my television. The audio sometimes does not work and sometimes is does. I cannot find the reason for it.
Can anybody help me with this?

I've tried to reproduce the two audio problems here with no luck.
The lowering of the audio volume sounds like a bug that existed in iMovie 4. The volume of a title was affected by the volume slider setting in iMovie as the title was rendered. If the volume of the slider was low while the title was rendered, the clip forever had that volume. I can't make that happen in iMovie 6, however.
Sometimes these problems are just playback issues in iMovie, where the underlying video is okay. You might try playing the Timeline Movie.mov (it's inside the project package) in QuickTime Player. To get to the movie, Control-click on the project icon and choose "Show Package Contents" from the popUp menu. Double-click on the "Timeline Movie.mov" inside the Cache folder. If that movie plays okay, the underlying audio is okay.
You might also try examining the audio level of the title clip. Select the clip, then choose View > Show Clip Volume Levels. If the displayed volume isn't the same as the clip before and after it, you may be able to adjust its volume.
Another workaround may be to extract the audio of the clip before adding the title. Extracting audio copies the audio of the clip to one of the audio tracks, then mutes the audio of the clip. (To restore the audio, just re-set its audio level to what it was.) Since the audio is no longer part of the clip, it shouldn't be affected by adding a title.
If there's anything unusual about the imported video -- that it was shot at LP speed instead of SP -- perhaps that is a contributing factor.
Very strange.
Karl

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ok, hmmm do you have any thing thats set to open when you login? if not what i'd like you to do for me is test it in a new user. create a temp acct on the computer and see if it does it there. if it DOESN'T then from finder select go>home>library>preferences>and take the com.apple.finder.plist and move it to the desktop then restart. if it DOES happen in the second user then please let me know and ill see if if i can find any thing else other than to reinstall snow leopard. if you do have login items i'd like you to remove them and reboot to see if it still happens.
>system prefs>accts>login items
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Hello zazu90,
Thanks for using Apple Support Communities.
To troubleshoot this issue where your touchscreen is behaving erradically on your iPhone, please follow the steps below.
Restart your device
Hold the On/Off button until "slide to power off" appears. Slide to power off your device. When it is off, press the On/Off button to turn it back on.
If you can't restart your device, reset it by pressing and holding the Sleep/Wake button and the Home button at the same time for a least ten seconds, until the Apple logo appears.
Clean the screen with a soft, slightly damp, lint-free cloth.
Avoid using the device while wearing gloves, with wet hands, or immediately after applying hand lotion.
If you have a protective case, or if you are using a plastic sheet or film on the display, try removing them and testing the device without it.
If the steps above don't resolve your issue, please schedule a service appointment with an Apple Retail Store for evaluation. If an Apple Retail store is not an option, contact Apple to find out your best service option or see the Service FAQ for your product.
iPhone, iPad, iPod touch: Troubleshooting touchscreen response - Apple Support
Take care,
Alex H.

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You are making me dig into nightmare-ish memories here.
Ok, I'll share.
This is how turned out:
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Grant Hiesterman wrote:
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Hello everyone,
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But once I export this movie (be it as a tiny 3GP clip or an iDVD project), these scenes will have a third, unwanted audio track added: the original sound from the clips following circa +one minute later+ in the movie - at full level, which is embarrassing, to put it mildly.
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AppleMan1958 wrote:
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If you create a custom speed (say 39% or 159%), then sound will be messed up.
I do in fact use such non-standard values for speed.
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Last edited by mrz87 (2011-05-11 09:12:21)

This was a problem with apache-2.2.17-2. Don't worry, it's fixed for good.
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Hello,
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Consider / Try:
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Good Luck!
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Dragon-Fur

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Zeno,
I feel so stupid, but that also crossed my mind.
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Why didn't I think of that before...

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Weird audio behavior

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