Quicktime on Mavericks outputs stuttering audio.

I am also using an Edirol FA-101 firewire interface, which has the problem in Quicktime only.

I also experienced this converting quicktimes, oddly these videos are playable in QT player 7.

I'm using Presonus FireStudioMobile and have the glitched out audio in Quicktime X.

I also get the same sound issue with HTML 5 based sound players when using Safari.

Quicklook in Finder plays fine, Quicktime 7 plays fine, iTunes, MPlayer X - etc etc.

Switching to built-in fixes the problem for Quicktime X

Didn't ever get an issue with Youtube Video - plays fine no matter what audio interface I use.

@fishcow Your symptoms are almost exactly the same as mine were. I am guessing, but may be wrong, that your youtube settings are for the default flash video option which worked fine for me too. However I prefer the HTML 5 option that you can set for your Youtube account and that was problematic sound wise.

I am reluctant to blame the interface drivers of any of these devices as :

a) After disabling AppNap ( or worryingly performing some completely unconnected action ) for Quicktime and Safari everything worked fine.

b) The sound in so many other ways ( Itunes music , Logic Pro, Quicklook etc ) worked fine.

I think it is Mavericks/Quicktime that needs to be fixed not the audio device driver.

@Scoobyclub

I didn't think of that, but indeed my youtube settings are default flash.

Disabling AppNap didn't help me unfortunately - avoiding Quicktime Player X and HTML 5 is my current work-around.

And yeah, I beleive that it's a Mavericks/Quicktime thing also.

Yes! My problem was solved with running Disk Utility and Reparing Permissions.

Guh! I'm SO jealous when that tool works for people! For whatever reason, it's seldom fixed an issue I have.

Good on you, NowWhat! 🙂

so just to make sure-we're talking about the crackling, right? I haven't seen any problems with stuttering.

and I have all the perported solutions in place for that and still getting crackling.

dt

Repair disk permissions has not fixed my issue not does preventing app nap in iTunes.

Just to recap: With Audio set for output via FireWire through a Focusrite Saffire Pro 14 audio Interface: MP4 played via QuickTime have crackling audio regardless of window size. These same files play fine with Quick Look regardless of window size. When playing MP4 via iTunes the files play OK until I click fullscreen then the crackling is back again. MP3 appear to play OK. I don't have any other file formats to hand to test.

All files appear to play OK via internal speakers

What is the location of the Quicktime Codec directory?

It used to be /library/quicktime but does not work anymore?

I really do not understand why apple is borking QT like this!

Osx is starting to look like iOS! For amateurs 😟

Same issue here --- APPLE PLEASE UPDATE US!!!!

gary - that really - REALLY - sounds like you've got a FireWire support issue. Is the card you're using the 400 speed connector? You might not have the correct kernel extensions for FW in your system.

At this pointI'd try expanding the search for answers wider - perhaps to dealing with or looking at coreaudio problems. There's a terminal command that seems to work for users with Mountain Lion - you did the migration right? One of the settings you've got may be resident from that prior OS - at this point I do not know if it can help or not..

In Terminal run: sudo killall coreaudiod - then enter and put in your password. This command shuts down the core audio daemon and forces it to restart with a new set of hardware preferences. Something isn't making the connection well between your FireWire sound card and the drivers. Why it is manifesting in fullscreen is a bafflement, that is for sure.

Good luck!

Deb.

I had the same issue with my Edirol FA-101 firewire (400) interface. This device is natively supported on OSX and needs no drivers. This would suggest that the issue is with the firewire audio driver in OSX, not the device manufacturer.

However, I found that repairing permissions (from a boot disk, not while booted into the startup volume), did resolve the issue as far as I can tell.

I actually had additional issues of Finder drag & drop and Finder window re-sizing not working properly. All of which was fixed by permissions.

I did a complete fresh install after reformatting, so my OSX install should have been perfect, but evidently wasn't.

This is a HUGE, HUGE problem for all pro users of Apple products, I work with CG Animations and SFX and I absolutely depend on this. I don't know why Apple do this, was the same thing when QT X came for the first time and they embedded the playback inside the viewer, so you couldn't review a frame by frame video without seeing the playback control. But this is even worst, I have over 6TB of data in MOV files, and just can't afford the time to convert all of this even for just preview them. Another kick in the nuts was loosing the ability to export for web. Thanks God I never erased QT 7 of my machine. I don't hope Apple fix this, I demand it!

Deb - tried that sudo command and no change, still have the problem. I have a Focusrite support engineer reviewing my system log to try and find out what the problem is as well. I will update you all if he finds anything