Quicktime on Mavericks outputs stuttering audio.

The sample rate change doesn't make any difference but setting the latency to long does appear to fix the problem. Thought I had tried that before.

Anyway, don't really want to keep the latency at Long as Quicktime/HTML5 Video worked fine on Short before ( and still does on all the other browsers, video players etc ).

It's still a significant bug that has been introduced with Mavericks.

As mentioned previously, even rerouting software such as Soundflower or Boom will cause the glitch on the internal speakers. Boom has found some way to work around the worst of it (perpetual audio stuttering), but they've been unable to completely get rid of suttering in some system sounds.

In another forum for DPS (another software audio rerouting solution), they say that Apple has not provided any guidance about changes in the way Core Audio functions, so it's hard for developers to fix an issue like that. To quote them:

"It seems Mavericks has issues with any audio kernel extension but there are no errors or documentation yet regarding this or changes to Core Audio for OSX. So we have to wait… We have narrowed down the choppy audio with video issue to Mavericks and QuicktimeX. This issue happens with any audio routing software, not just DPS."

http://dpsinsider.com/forums/topic/mavericks-osx-issue-list/

I have a hard time believing that it's all these developers' and hardware makers' collective faults when Apple's own software are the main culprits.

Thank you Apple for making us WASTE TON OF TIME.

I have 300 videos that needs to be converted for even to see what is in them

Total waste of time.😠😠

You can see why Apple does not allow people to go back to Tiger. Another words they are clearley saying Suckeeeers we got you.

Well as you probably all know Maverick 19.9.1 didn't fix out stuttering audio with QuickTime problem. I've just read the release notes for 10.9.2 which is now with beta testers and there's no sign of a fix in that release either!

Apple either see this as a problem with the 3rd party audio interface drivers or don't see it as a priority problem. Also still not sure why .avi files that played fine in 10.8 now need converting before playback with QuickTime.

I have been encountering an issue where audio stutters when playing content in both SD and HD in full screen in iTunes & also when streaming content on Vimeo and Soundcloud as well as simply playing content in Quicktime X. Preventing App Nap has not resolved the issue.

I am using an audio interface connected via firewire which has always and continues to operate as expected in other applications.

All software is up to date. All Safari based issues occurred after OSX 10.9 Update was released.

Here is another support thread of multiple users documenting the same issue.

https://discussions.apple.com/thread/5419696?answerId=23592155022#23592155022

I think I've found something. I use a UA Apollo Audio Interface and the problems all occur when set to the default 44.1khz playback smaple rate but a the stuttering disappears when I change the sample rate to 48khz. Perhaps a solution would be to open the Audio Midi setup prefs panel and change the sample playback rate there.

I am using a Focusrite Saffire Pro 14 via FireWire and changing the sample rate does not solve the problem.

QuickTime won't even convert some of my .avi files that worked perfectly in the previous OS. This stinks.
Not only do I waste time because I can't see them in Quick Look. But, when I open them it starts converting them and, then stops saying it can't.

I am also using Saffire PRO 14 and I have the same problem as you. Sound in quicktime 10.3 with clicks

Just found the issue myself.

I read the whole thread and the only work around I found here is

RUNNING GARAGE BAND IN THE BACKGROUND???

ARE YOU SERIOUS APPLE???

Get on this already!

I spent a great deal of time (& MONEY) to upgrade to this latest mess!

Stuttering Audio

Macbook pro i7 / Mavericks / Quicktime 10.3 / Saffire pro 40

jimmy_013 - Found myself with the same issue as well. Stuttering audio, Full screen itunes + QT. Tried the following:

PRAM Reset

plist trash

Update Audio Interface Drivers

Reinstall Itunes

Only thing that helped is opening Audio Midi Setup, changing sample rate to 48, and having garageband/logic open, changing that to 48k, and leaving it open.

Hopefully theres a fix soon.

Hi Jimmy, do you use Saffire Mix Control if so try this, set the sample rate to 48khz and latency to long and see if that cures it.

Kirby

Thanks Kirby,

I did infact try that before I posted. No dice, hopefully a code update will available soon.

I installed quicktime player 7 again on my computer. You can find it on the right side of this page, and for now, I can open and play all my converted quicktime movs without crackles and pops. . It is a problem in quicktime 10.3.

Give the programmers from Apple the air to work on a solution. In the mean time use quicktime 7.

Olivier

Video Editor

That might solve problems with Quicktime, but not the other problems mentioned above. Like Soundcloud.

I really don't get why Apple hasn't come up with a fix yet. But they are probably too busy inventing shiny new tools for posers.

P.s. using a Saffire Pro 24 DSP here.