tttxx
Level 1 (10 points)

Q: Sound stuttering after Mountain Lion install

Dear community,

 

after having installed OSX Mountain Lion my sound startet stuttering whenever there is rapid movement on my screen.

This includes e.g. window movement, scrolling through image loaded websites or video playback (flash player, quicktime).

A restart didn't help. I'm using stereo output, not digital.

 

I have connected a second monitor but the problem persists after disconnecting it. Movement on the second monitor also causes the sound to stutter.

My GPU Diode temperature is at 85°C (there is some bug that keeps the GPU under load while a second monitor is connected AFAIK), but I guess it was the same under Snow Leopard.

 

In Snow Leopard the sound output was always perfect even under heavy load or heavy HDD I/O.

 

Any ideas?

iMac (27-inch Mid 2011), OS X Mountain Lion

Posted on Jul 28, 2012 5:55 AM

by Studio Engineer,Solvedanswer
Studio Engineer Studio Engineer
Level 2 (445 points)
A:

deluxeczech wrote:

 

I, too, am having this sound stuttering problem...and it all started after I upgraded to 10.8.  :-(    I have a 27" 3.1 GHz Intel Core i5 with 16GB of memory.  (My husband has an older 2009 model of the 27" and he is having the sound stuttering problem since ML too).  I can promise you that we had no such problems before upgrading, and are not ones to constantly install new software/games/etc.  We do both play World of Warcraft but have done so for a few years on our various Macs.  We don't listen to music or watch videos much on our desktops, so I cannot speak to other sound problems, but when playing WoW and using Ventrilo, there are occasional stuttering instances.  It is not very consistent (that is, always does it during X or Z).  In fact, using Ventrilo tonight and had no problems, but a week ago experienced stuttering when someone else was talking. 

 

I do wish Apple would AT LEAST release a statement acknowledging this issue.  We both work in IT development, so we understand that there are sometimes mystery problems that take time to troubleshoot.  NOT saying anything, however, just makes the company seem uncaring of its customers.  Personally, I would be a bit more content if I KNEW that Apple KNEW and that they were looking into it.

 

While not an ideal situation, it's good to know we are not alone in this...

 

 

Your problems will most likely be related to OS X "sandboxing" just about anything you do.... Sandboxing was supposed to be a "coherent" feature. But wound up being a total performance killa... Apple have been working on this issue a LONG time since 10.8.2.... hence them releasing more betas of 10.8.3 than (I think) any other beta OS X before that... A HUGE problem causing havoc with almost ALL 3rd pty. high performance software..

 

If you are a CRACK... You can google-search (goes beyond this here thread) ways of "overwriting" what OS X regards as "Items/processes which should be sandboxd"... To STOP this non sense...

 

We had to manually delete A LOT of files on the OS to get our system running to accommodate a pro-environment. Even "Files" that Apple forgot to delete themselves.......(Do the G-search or this thread WILL be deleted... hence me NOT going into details)

 

What COULD help you is to safe-boot ONCE and log in.. Then boot normally.. That in MANY cases will take of the problems (short-sighted-ly)... Each time you re-experience the issue... Redo aboe

 

IHTH

Posted on Mar 9, 2013 8:15 PM

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Q: Sound stuttering after Mountain Lion install

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  • by Reactor-Core,

    Reactor-Core Reactor-Core Aug 10, 2012 2:45 PM in response to Lvivske
    Level 1 (0 points)
    Aug 10, 2012 2:45 PM in response to Lvivske

    Yes, pretty much what I hear with my own audio playing. Crackling noise and major lag spikes in whatever app i'm in with mouse/curser lag sporadic behavior. Thanks for the upload.

  • by Carlo TD,

    Carlo TD Carlo TD Aug 10, 2012 2:53 PM in response to tttxx
    Level 3 (558 points)
    Aug 10, 2012 2:53 PM in response to tttxx

    uninstall flash player completely. Restart your computer. Then see what happens.

  • by pepper_chico,

    pepper_chico pepper_chico Aug 10, 2012 3:03 PM in response to Carlo TD
    Level 1 (0 points)
    Aug 10, 2012 3:03 PM in response to Carlo TD

    Well, this thread IS NOT ABOUT A FLASH PLAYER PROBLEM. I say this because I have the occasional system stuttering and the constant iTunes stuttering problem.

    And I can play streamed youtube videos without problems.

  • by IBurchett,

    IBurchett IBurchett Aug 10, 2012 11:42 PM in response to tttxx
    Level 1 (0 points)
    Aug 10, 2012 11:42 PM in response to tttxx

    Noticing the tendency for the higher end machines to suffer this issue in addition to the rather erractic nature of the problem in that everybody appears to have a slightly different issue and it's got me thinking that my issues tend to be after my machine has been switched on for a while. I saw another thread from a guy who used a 3rd party app to increase his fan speed in his MBP and it's cured his similar problems.

     

    Could we be talking about an overheating issue here...? Have to admit after years of building my own PCs, those machines with poor cooling were always the ones with glitchy errors, but it seems strange that it's really only to do with video/sound...

     

    Anyway, I notice there's a patch today... for HP printers - great, I'm sure that must be a real priority

  • by dcollett.seattle,

    dcollett.seattle dcollett.seattle Aug 11, 2012 12:03 AM in response to IBurchett
    Level 1 (5 points)
    Aug 11, 2012 12:03 AM in response to IBurchett

    It *could* be overheating, but then again, it seems that it could be a lot of things. I've tried it on a cold machine (new iMac), and the problem is there within a few minutes of watching full-screen video.

     

    Here's all I know from this thread and my experimentation (and that of others):

     

    1. It is not machine specific: iMacs, Mac Pros, and MBP are all affected

     

    2. age of the machine isn't a factor: it affects brand new machines or those several years old

     

    3. it is not a Flash problem

     

    4. doing all the "normal" goodies (PRAM, repair, permissions, blah, blah) doesn't fix it

     

    5. it is not a browser issue (happens with *any* browser)

     

    6. it is not *only* video or *only* sound: it may be either or both

     

    7. it is not Netflix (that is, Silverlight) because it happens in other apps

     

    8. we *think* it isn't junk left over from 10.7 in the User folder because even a clean install on a wiped drive has the same issues

     

    9. in addition to #6 above, the problem goes beyond just video stalls and audio "crackles": worse, it involves the entire system "rubberbanding" effect (the mouse or menus, etc. just lock up for 1-5 seconds then start working again.) Similarly, when the audio and/or video stalls, *sometimes* doing nothing for 5, 10, 30 seconds and everything is "OK" for a bit.

     

    10. it is *not* other applications running or having run; lots of us have restarted (or shut down/restarted), and have no other (user) apps running except for one program when the problem starts.

     

    Therefore, my THEORY is that this is a problem deep in the OS in terms of caching (?) or something (I'm not a programmer, so I have no idea) that's causing the problem to occur consistently yet sporadically.

     

    After 2+ weeks of trial-and-error experimentation from all of us, it's unlikely that we will solve this issue.

     

    However, if anyone on this list ***does*** manage to figure it out, you will be a legend, and we'll get c|net to interview you the next day.

     

    Best to you all.

    David

  • by duntuk,

    duntuk duntuk Aug 11, 2012 10:19 PM in response to tttxx
    Level 1 (0 points)
    Aug 11, 2012 10:19 PM in response to tttxx

    This is definitely a Mountain Lion issue, because using LineIn, I get crackling and sound degredation with pass-through audio going into my external audio interface of my S4... However, using Native Instruments S4 2.5.1 beta driver through Traktor 2.5.1 pass throught the audio plays perfectly.

     

    Anyhow... since this is OS related, theoretically this should work:

     

    http://www.native-instruments.com/forum/showpost.php?p=1054476&postcount=139

     

    What it does is disable USB 3.0 support... and forces USB 2.0 only... reportedly this fixed the sound degredation issue for everyone, even before the Native Instrument's 2.5.1 public beta driver...

     

    So people may want to give that a shot prior to 10.8.1.

  • by duntuk,

    duntuk duntuk Aug 11, 2012 10:23 PM in response to duntuk
    Level 1 (0 points)
    Aug 11, 2012 10:23 PM in response to duntuk

    btw, I'm having the sound degration issue on an 2010 iMac... using a clean install of mountain lion... Meaning I don't even have USB 3.0 available on my computer, and still getting the crackling sound.

  • by davidvoy,

    davidvoy davidvoy Aug 12, 2012 10:06 AM in response to strat4ed
    Level 1 (9 points)
    Notebooks
    Aug 12, 2012 10:06 AM in response to strat4ed

    I just installed a 10.8.1  patch that i found on theses discussions...
    I found the discussion in my email....... asking if anyone else can confirm the fix after the 10.8.1 patch.

    and there is a link to download the patch.  but when i click on the original Apple Discussion forum thread,
    it acts like they locked and not allowing people to access it.

     

     

     

     

    Apple Support Communities      

    Re: Sound stuttering after Mountain Lion install

    created by Lvivske in OS X Mountain Lion - View the full discussion

    sixfour wrote:

     

    Can anyone confirm 10.8.1 fixes this problem? 

     

    You can download the patch here.. LINK

     

     

     


    I downloaded it and installed it, it seems it fixed only part of the issues.  BUT the crackle in audio is still present. I HOPE they fix it sooner than later.

     

    here is my quick audio recording that demonstrates my crackle issue.

    Used Audacity 2.0 and my Line 6 PODxt USB Guitar Processor input.

     

    http://soundcloud.com/davidvoy/still-crackles

  • by strat4ed,

    strat4ed strat4ed Aug 12, 2012 11:55 AM in response to davidvoy
    Level 1 (0 points)
    Aug 12, 2012 11:55 AM in response to davidvoy

    I did apply the patch too, and miracle! recording is back to normal, sound is as it was before , using my podXT and garageband on my 2007 MBP, I do believe it was a USB problem, haven't tested yet with the 2011 macbook air, I' ll keep you posted, Ed

  • by Carlo TD,

    Carlo TD Carlo TD Aug 12, 2012 12:17 PM in response to dcollett.seattle
    Level 3 (558 points)
    Aug 12, 2012 12:17 PM in response to dcollett.seattle

    I have an idea... have you plugged in head phones... to see if you still hear the sound with head phones on?

  • by davidvoy,

    davidvoy davidvoy Aug 12, 2012 12:27 PM in response to strat4ed
    Level 1 (9 points)
    Notebooks
    Aug 12, 2012 12:27 PM in response to strat4ed

    strat4ed:

     

    I installed the patch and i still have issues with crackles in audio using my PODxt .

  • by Lvivske,

    Lvivske Lvivske Aug 12, 2012 12:31 PM in response to Carlo TD
    Level 1 (8 points)
    Mac OS X
    Aug 12, 2012 12:31 PM in response to Carlo TD

    If you had been following the discussion, you'd know that line-out is affected just as USB-audio and speakers

  • by Carlo TD,

    Carlo TD Carlo TD Aug 12, 2012 12:33 PM in response to Lvivske
    Level 3 (558 points)
    Aug 12, 2012 12:33 PM in response to Lvivske

    two questions: did you try it? do you have your line out to act as a line in?

  • by davidvoy,

    davidvoy davidvoy Aug 12, 2012 12:34 PM in response to Lvivske
    Level 1 (9 points)
    Notebooks
    Aug 12, 2012 12:34 PM in response to Lvivske

    I noticed since update to ML  10.8 and even 10.8.1 patch, OVERHEAT is an issue.  occasionally my iMac just shuts off and now my avg temp is  120 Deg F,    and power supply temp ia 167 deg F,  I never EVER had any overheating and shutdown issuse in over 6 years until Mountain Lion Update, So upset.

  • by Carlo TD,

    Carlo TD Carlo TD Aug 12, 2012 12:36 PM in response to davidvoy
    Level 3 (558 points)
    Aug 12, 2012 12:36 PM in response to davidvoy

    Well that could be something serious... like the logic board... and if that goes, you are... well... lost everything if you dont have a backup... I would take it to an Apple Store and do a full backup asap.

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