Why Is Quicktime Audio Always Garbled On My PCs?

Why is Quicktime Audio always garbled to the point of complete uselessness on my PC?
I have downloaded the latest version, although it has been garbled on every other version for the last ten years anyway.
I have set the audio to safe mode.
I have changed the Playback from going through Total Recorder to going through the sound card.
Nothing ever changes. Quicktime has never had intelligible audio on my PC.

I´m having the same exact problem. Does anybody have a solution?

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Just to let you know, I think I figured out what to do. I ended up sharing the iMovie HD as a Quicktime movie. Then I opened up iDVD and imported that Quicktime movie. The sound is good on the DVD. I do think there is a problem with the audio encoding between these programs and that is a real issue Apple must address. Let me know if you have solved this issue too. Thanks, Reid

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I have the same problem.
Motherboard: Gigabyte GA-MA785GPMT-UD2H
Chipset:
North Bridge: AMD 785G
South Bridge: AMD SB710
Video: Integrated ATI Radeon HD 4200
HDMI Audio through the HDMI port out to the TV.
Tried on Windows 7 Pro 32bit and Windows 8.1 Pro 64bit.
Tried with the integrated ALC889A audio device enabled and disabled (It seems that the video card drives the HDMI audio device though, because it still appears in Windows even if I disable the Audio device in BIOS).
Latest iTunes and drivers installed.
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Flash files with audio sound garbled or high pitched

I have finally clarified the sound problem I reported in this
forum.
See below.
TechSmith
Camtasia Studio Support
Flash files with audio sound garbled or high pitched
Question
Flash files played in the the newest version of the Flash
Player sound garbled or have a high-pitched "chipmunk" sound to
them.
Answer
http://techsmith.custhelp.com/cgi-bin/techsmith.cfg/php/enduser/std_adp.php?p_faqid=1250&p _created=1197056770&p_sid=BZo7CNSi&p_accessibility=0&p_redirect=&p_lva=&p_sp=cF9zcmNoPTEmc F9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MTImcF9wcm9kcz0wJnBfY2F0cz0mcF9wdj0mcF9jdj0mcF9 zZWFyY2hfdHlwZT1hbnN3ZXJzLnNlYXJjaF9ubCZwX3BhZ2U9MSZwX3NlYXJjaF90ZXh0PUZsYXNoIFBsYXllcg**& p_li=&p_topview=1
Flash files with audio sound garbled or high pitched
Question
Flash files played in the the newest version of the Flash
Player sound garbled or have a high-pitched "chipmunk" sound to
them.
Answer
The latest release of the Flash Player (v9.0.115.0 released
on 12/03/07)) causes audio to sound garbled and/or high pitched
like a chipmunk. Our development team is looking into this issue
and working to find a fix.
To avoid this problem, you can roll back your Flash Player to
a previous release. If you have problems installing an older
release of the Flash Player please review this article and contact
Adobe for further support.
At this time, the problem is limited only to SWF files
produced with the MP3 audio codec. As a workaround, you can produce
your SWF files with the PCM audio codec or use the FLV format
instead of SWF.
Adobe Flash Player Support
Reinstalling an earlier version of Adobe Flash Player
Contact Adobe:
http://kb.adobe.com/selfservice/viewContent.do?externalId=kb402435&sliceId=1
Safe versions security restrictions when installing Flash
Player
Issue
If you previously installed a later version of Flash Player
for Internet Explorer, you may be prevented from installing an
earlier version. For example, if you installed Flash Player
9.0.47.0 and attempted to install version 9.0.45.0 the installation
would fail.
Reason
This issue is due to registry key settings applied by the
Flash Player security model. The restriction is to prevent users
from downgrading Flash Player minor versions. The minor version of
Flash Player is the third set of numbers in the version name. For
example, the minor version for Flash Player 9.0.47.0 would be 47.
If Flash Player 9.0.47.0 was installed and you attempted to install
9.0.45.0 (minor version 45), the installation would fail.
Solution
To resolve this, download the uninstaller for Flash Player
from "How to uninstall the Adobe Flash Player plug-in and ActiveX
control" (TechNote tn_14157).
Select Start.
Select Run.
Type cmd
In the command window, type the following:
uninstall_flash_player.exe /clean
This will remove all entries in the system registry and
resolve this issue.
Note: The uninstall_flash_player.exe file must be saved to
the same directory that the command window is in, for example C:\.
Additional Information
If you are still having trouble installing Flash Player,
please see "Troubleshooting Adobe Flash Player installation for
Windows" (TechNote tn_19166).
TechNote Details
Last Update: 08-16-2007
ID: kb402435
OS: Windows Vista
Windows XP
Browser: Internet Explorer
Permanent Link:
http://www.adobe.com/go/kb402435
Products Affected: Flash Player

Hi,
I doubt it's Safari that's changing the settings:
Why does this happen?
Some third-party audio applications may change your computer's audio output setting. In fact, if you use the third-party application again after applying the above solution, the issue might occur again.
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Why Is Quicktime Audio Always Garbled On My PCs?

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