QuickTime 7 Audio stutters and distorts

When I watch videos with QuickTime 7 the picture quality is perfect but audio is stuttery, distorted and unlistenable. I have Windows XP Pro.
Haven't found a discussion or Apple Support topic that addresses this problem, however from related issues have tried adjusting streaming rate and Wave Out settings in QT 7 with no joy.
I uninstalled and reinstalled QT version 6.5.2 which plays everything absolutely fine, problem solved. However iTunes will not now work/open as error message comes up - it requires QT version 7.0.3 or later.

Oh, I forgot: the strangest of all is that itunes works perfectly well even though it supposed to rely on quicktime...
Windows XP Pro

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Quicktime movie audio stutters and freezes viewer and browser

I uploaded a Quicktime movie to my website and it plays fine on all of my computers except one - the one that I do my website on. All Quicktime movies hang with rapidly looping audio on this machine - even the ones on Apple's website. This lasts for a minute or two and hangs the programs until it stops. Other video and audio formats work fine on this machine. Help!
pentium 4 Windows XP Pro
pentium 4 Windows XP Pro

Hard to believe there are no takers.
Hardly surprising. You didn't really ask a question to which readers could respond nor do you seem to be looking for a workaround for your unexplained and rather circuitous workflow. I did attempt to duplicate the download/conversion process using my own system, software, and workflows but since you did not include any particular YouTube source file (i.e., URL) reference and my results were different than yours, I can't even be sure I started with the same content as you. Basically, such sync problems normally devolve from a problem in the source file or in the processes used to download and/or convert the content.
A YouTube search for the file name referenced in your initial comments directed me to this YouTube page which I used as a source file: http://www.youtube.com/watch?v=d_INlMhECFA
However, when I downloaded the 426x240 version of the YouTube source file, it turned out to be a standard H.263/MP3 FLV file with stats quite different than those of your H.264/AAC MP4 download posted above and which did not display any AV sync issues. (Source File)
I then used QT 7 Pro (with Perian codec package installed) to directly convert the H.263/MP3 FLV compressed data to an H.264/AAC MP4 file having the same target settings as the original FLV file. (Converted File)
In short, based on the information provided, I cannot duplicate your problems. In addition, the downloaded 720p30 resolution H.264/AAC MP4 version of the same content also played correctly in the QT 7 player without conversion or additional third-party codecs. At this point (i.e., without further information to the contrary), I suspect your issues may be self inflicted as a result of your workflow and may explain why others have failed to make comments here.

Satellite L655 S5107 Audio stutters and it also crashes

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You might want to share that information on the appropriate forum.
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Go to Solution.

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Quicktime 10 player stutters and skips but quicktime pro doesn't

I have a early 2011 17inch i7 mac book pro and just recently when I play 60fps footage from my 7D camera in quicktime 10, the clips stutter and skips, it does this intermittently and in different parts of the same clip. I can play the clip and it would stutter at one point and then when i play it back again it would play fine at that same part and then stutter at another part. But when i open the same footage in quicktime 7 (quicktime pro) it play with no issues every single time.
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Is this a hard drive issue, a grafics card issue? I was at the apple store and seen a genuis and we tried to troubleshoot it but cold not figure out the issue. The apple rep said to replace the hardrive, but i want to make sure before I do. Does anyone have any suggestions.

Thanks for the response.
I didn't realize those settings weren't controlling the same function, but I see that now... Fact is, I don't use QT all that much, and don't need much functionality from it, just to watch a few screen capture videos I create using Snapz Pro X.
Problem is, I can't control rewind/fast-forward if I can't see the controls, and QT doesn't default to showing the full display. Unfortunately, it seems the pref setting functionality I want apparently doesn't work for MY needs, so I'm stuck with having to manually select the 'fit to screen' setting EVERY TIME I open a new .mov video in QT. I see there's a keyboard short-cut to "fit to screen" (Apple Key/3), but the only thing better than needing to use a key combo EVERY time I open a movie is not needing to use one at all! Very Un-Maclike...
Wondering why QT Pro can't default to opening to the USER'S preference (whether fit to screen or full screen), so as not to have to change it EVERY TIME? This is a PRO app? How long has QT been released, a decade or two? Shouldn't it a mature app, at this point, with little nit-noids like this worked out?

Stuttering and skipping audio, and an accidental QuickTime workaround

Hi,
I've been having periodic problems with skipping and stuttering audio since the 10.5.6 or 10.5.6 update to OS X. Lately, it's become worse. Just about all of the audio on my system, except for Flash, stutters and skips. I visited the Genius bar at the local Apple store yesterday, and he had never seen anything like it, and suggested an archive and install of the OS, which I'm not quite ready to jump to yet. So this morning, I decided to post my problem here, and I thought it would be a good idea to make a recording of my audio problem so people would know exactly what I was talking about. Since this problem also exists in iTunes, I decided to open a QuickTime Audio Recording window while I had a particular audio file playing in iTunes repetitively. So I had the audio file playing, with its stuttering and skipping, and I opened the QuickTime Audio Recording, and waited for another skipping and stuttering occurrence. To my surprise, the skipping and stuttering stopped! I let the same audio file play for about 20 minutes, and it played perfectly. Also, while the QuickTime Audio Recording window was open, all of the other sounds (alert sounds from apps, etc.) played perfectly. When I closed the Audio Recording window, the audio problems came back! So the good news is that I've apparently found a workaround to my problem. The bad news is that I still don't know how to fix it properly. The Apple Genius suggested that I download and reinstall QuickTime, which I did, but that didn't solve the problem. I have a feeling now that this problem is related to QuickTime in some way. I'm wondering if anyone can offer additional suggestions as to a fix for this. When I right-click on an audio file and select the "Open With..." option, among the choices are three QuickTime versions, 7.5.5, 7.6, and 7.6.4, which make me think that there might be leftover components from older versions of QuickTime on my system. Is there any way that I can do a "clean" install of QuickTime that's more thorough than just a download and install?
Thanks,
Ken

Hi, QuickTimeKirk,
You asked an interesting question, and here are the results;
When I tried to open a file with QuickTime 7.5.5, it opened, and the About box reported that it was indeed QuickTime 7.5.5.
When I tried to open a file with QuickTime 7.6, the QuickTime menu options briefly appeared for 1-2 seconds, and then disappeared. After this, I couldn't find any indication that QuickTime was running, neither by cmd-tabbing nor by looking at the processes in Activity Monitor.
And QuickTime 7.6.4 opens fine, and is listed as the default app for opening this particular audio file.
Here's some more info. I did a Spotlight search on "QuickTime", and it found two versions of the QuickTime app. Version 7.6.4 was in the Applications folder of my system drive, and Version 7.6 was in the Applications folder of a 10.4.11 installation that I have on another partition of the same drive. I found no listing for a 7.5.5 app, but when I looked again at the 7.5.5 About box, I saw the following:
QuickTime Player
Version 7.5.5 (249.24)
Quicktime(tm) Version 7.6.4 (1327.73)
Copyright (c) 1989-2008 , Apple Inc.,
All Rights Reserved
Is this normal, to have two different versions listed for a single instance of QuickTime?
Thanks for your help.
Ken

When I import a video recorded in Quicktime, the audio and video don't sync. Any solution?

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Mystery audio performance changes and distortion

I listen to a lot of rock, hard rock, and heavy metal on my 80GB Video iPod. In the past two months, I’ve been having problems with distortion and equalization. I do have the latest iTunes and iPod software updates installed and I have re-instaled iTunes and re-initialized the iPod.
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After a while, I started to experience distortion and loss of detail, especially on the left side (crackling). I thought I had damaged the vModa Vibes, so I purchased a pair of Ultimate Ears Super.fi 5 Pro Earphones.
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The Bose TriPort IE earphones were much better than the Ultimate Ears Super.fi 5 Pro earphones, but still lacked high frequency and mid-range detail as compared to the vModa Vibes.
While switching back and forth between the vModas and the Bose earphones, the sound performance (or equalization) seemed to change at random, even though I kept the EQ set to off.
At one point, the vModas suddenly had incredible bass, while maintaining the other performance characteristics, with the EQ still set to off. Later, I played the same song again, and the bass was normal (all I did was charge the battery with the Apple USB AC adapter).
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The performance issues seem to somewhat track battery charging (i.e. – after I charge the iPod up, audio performance changes and it sometimes improves as the battery drains).
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I went out and bought a 2 GB iPod Nano and loaded some songs onto it.
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I reinstalled every windows driver in my devices, I reinstalled every driver from this website and I have done a out of box restore. Nothing has helped.
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Right now I have stripped all unnecessary programs and upgraded my wifi to the euro version of atheros. I believe I have done everything possible to speed up and make my computer stop popping and stuttering and it continues to do so as well as spike in the red of my latency testers.
Please help!

It sounds like you've done everything you can, especially considering that you did an out-of-box recovery. I'd agree that it's time to send it for servicing (or live with it, I suppose).
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Since installing Logic Pro 8, I have two problems which I suspect may be related:
1. Launching Logic will sometimes freeze my Mac and bring up that familiar screen that says I must immediately restart. This seems random, happening maybe one time out of 7 or 8.
 2. The other problem is that launching Logic 8 sometimes results in apparent misbehavior by my PCI audio card, a Delta 1010. In such cases, I will immediately hear something that sounds like very loud white noise coming out of the audio interface and into my mixer, but with a rapid stutter (confirmed by the VU meters on the Delta control panel, which vibrate like they're having a seizure). Nothing seems to stop the noise, except quitting Logic and restarting the Mac. This misbehavior seems quite random and there's nothing I've been able to do to track it down or make it repeatable -- all I can do is quit Logic, restart, and hope that this time it works. Fortunately, if I can finally get Logic 8 launched without the noise factor, it runs fine and virtually never crashes.
Anyone have any similar problem or ideas about the cause? I'm thinking about replacing the Delta 1010 with a new Firewire audio interface, in anticipation of buying a new Mac later this year. But I don't want to do it now if it's not the 1010's fault.
(Details: I am using the latest driver for the Delta 1010, downloaded from M-Audio's web site; the latest version of Logic 8 (8.0.1); and Mac OSX 10.4.11. I've got this all running on an older Mac, a G4 Dual 1.25 with 2 GIGS Ram. I've got the Delta 1010 selected as the default input and output in Audio MIDI setup, using the Mac built-in output only for the System Output. None of these issues were happening with Logic 7, and I haven't changed anything since then, except for installing Logic 8 and gradual Tiger upgrades. I also seem to have no problems using the Delta 1010 with Final Cut Pro. I suppose the possibilities are: incompatibility with Logic 8 and some other software, the Delta 1010 card is going bad, an issue with other connected peripherals (USB hub, Firewire Hub, Edirol UM-550), bad ram... or something else?)

Hi,
There are two things to bear in mind here.
1) In my experience, it takes a little longer for the driver to kick in after boot up, so wait a minute before launching Logic.
2) I recently reinstalled the 10.4.10 driver on my friend's Mac (same config as yours) and it now works as it should.
Best Wishes

Logic Pro 9.1.7 + Imac 2010 + 10.7.4 + Firewire = Audio Error and Solution.

Hi all,
This post is the end of a weeks long hair pulling, to save other people the pain of my past week, here is a quick rundown of the issue and the solution that for us at least worked.
All the software is legit and fully updated btw, before people ask.
Logic Pro 9.1.7 on 2010 Imac on 10.6.x, Refx Nexus, Sylenth plus many other VST's and Au's, Mackie Pro + Extender, 2 Midi Keyboards (Oxygen 49 and Alexis 49) and with a M-Audio 410 external soundcard running 10.1.3 driver, all working.. only issue we had was when copying midi between tracks into differing plugins the midi would corrupt the plugin requiring a restart of Logic.
This error we later discovered was due to midi automation for plugins being copied over, but that is not this issue.
Updated OS from 10.6 to 10.7.4 by way of 10.7.4 Combi Update. Removed M-Audio Drivers and then installed 10.7.4,
Installed brand new GRAID 4TB external disk (Raid 0 at 64kb block sixe) and connected M-Audio 410 via daisy chain.
Installed M-Audio Drivers, all ok.. at first..
Graid is 800, M-Audio is 400.. Connected as Imac -> GRaid -> Maudio
At first, its good, no issues.
Copied over a whopping 550GB off Imac onto external.. then later on, rebooted mac and started working on music.
Ran Logic Pro (64bit mode), whilst using Midi with Nexus we discovered the Audio at first was ok, but quickly over time degraded to where the sounds started becoming distorted, the more we went on, the more the distortion increased, after a while the midi notes were just sounding awful.
Rebooted mac
Started using Logic again, not 1 minute in, External drive and M-Audio disconnected themselves from the Mac.
Rebooted
Hard drive now seen, no M-Audio.
Now though, even using Itunes or Quicktime or VLC on any mp3 via internal soundcard, quality was.. well terrible. Within 2 seconds of hitting play, you knew it was bad.
Shutdown, removed external drive from chain, rebooted Mac -> M-Audio
M-Audio now seen, sound quality dreadful, shutdown Mac, rebooted without M-Audio, sound still awful just on Internal audio.
Time passes, I smoke too much, prod and poke and eventually reach for the install media
(Lots of shutdowns and restarts in next bit, after each line, also carefully reset and tested every Audio setting.)
Removed M-Audio driver
Installed 10.7.4
Installed M-Audio
All good again.
Later, as a test, connected External drive on its own, no M-Audio
All good.
Second test, added External Drive plus chain to M-Audio
Not good, M-Audio seen but even though sound bars showing on M-Audio software, no sound out to mixer
Removed External Drive from Chain, M-Audio now straight to Mac.
All BAD; sound was terrible,
Disconnected M-Audio
Playing any Mp3 via internal Audio, terrible..
Whatever happened, has thrown the entire Audio system into a mess, again!.
Removed M-Audio driver.
Reinstalled 10.7.4
Reinstalled M-Audio Driver
All good, on internal or external Audio
Disconnected M-Audio
Reconnected External Drive Only
Drive OK, Internal Sound OK.
Removed External drive
Reconnected M-Audio
All ok, internal or External.
Ok, Final conclusion.
When the M-Audio (400FW) is connected to Mac via External Drive (800) the Audio is knackered from that point onwards on 10.7.4, removing M-Audio drivers and re-installing makes no difference, even the Internal Sound is knackered.
Only solution at this point, remove M-Audio driver, reboot, reinstall 10.7.4, reboot, reinstall M-Audio Driver, reboot.
Then its all good again.
My guess is this, and I am probably wrong but it is all I can think of.
When the M-Audio is daisychained the Mac changes a setting somewhere, probably to adjust for high latency, at this point it is written somewhere (either as a file or as DSP bios setting) that is not being reset.
This is why it is completely broken until 10.7.4 is re-installed at which point whatever setting it is that was changed, is reset.
This is all I can think of, I have posted this so that if someone else in the weeks ahead has a similar issue, it will save you the stress and late nights I had this past week.
Take care all.

I was seeing the same problem... I'm a new Logic user, switching from DP, and so it was a minty fresh install of Logic Pro 9.1.7 under ML.
It turned out to be a third party graphics driver that was screwing up some internal process: specifically, the dirver for AirDisplay, an iOS app that lets you use an iPad as a portable monitor. When I removed the driver, the problem cleared up instantly, and I have done 9 hour sessions in Logic since then without a single hiccup.
If you're running a third party driver, remove it, repair permissions and see if the problem clears up.

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