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 sixfour,

    sixfour sixfour Jul 30, 2012 1:14 AM in response to dcollett.seattle
    Level 1 (0 points)
    Jul 30, 2012 1:14 AM in response to dcollett.seattle

    I don't know which ML update is it, the poster says the problem fixed with the latest update.

     

    http://att.macrumors.com/showthread.php?t=1414331

    http://att.macrumors.com/showthread.php?t=1414451

  • by dcollett.seattle,

    dcollett.seattle dcollett.seattle Jul 30, 2012 1:22 AM in response to tttxx
    Level 1 (5 points)
    Jul 30, 2012 1:22 AM in response to tttxx

    Well, the App Store reports nothing, Software Update reports nothing, and I can't find anything on the web about an update to ML.

     

     

    I know this doesn't help any of us now, but if you are wondering when Apple might release 10.8.1, read on:

     

     

    http://bit.ly/Mf78Fl

     

     

    David

  • by Lvivske,

    Lvivske Lvivske Jul 30, 2012 8:02 AM in response to sixfour
    Level 1 (8 points)
    Mac OS X
    Jul 30, 2012 8:02 AM in response to sixfour

    I'm also posting on MR about this, having a similar issue with suttering / skipping since the upgrade

     

    No drastic CPU useage when this happens, and it hits me at random. The PC does feel slower when its happening, though, and it seems to be triggered when swiping or typing or doing anything that requires processing (whereas if I just sit there listening to music, it wont start clipping by itself)

  • by Ivan Clarke1,

    Ivan Clarke1 Ivan Clarke1 Jul 30, 2012 8:07 AM in response to Lvivske
    Level 2 (319 points)
    Jul 30, 2012 8:07 AM in response to Lvivske

    Do you have sound flower installed?

     

    There seems to be an issue concerning this

  • by sixfour,

    sixfour sixfour Jul 30, 2012 8:13 AM in response to Ivan Clarke1
    Level 1 (0 points)
    Jul 30, 2012 8:13 AM in response to Ivan Clarke1

    It happens to a fresh installed system with nothing else installed.  Either with the onboard card or later (installed after testing out with the onboard card) installed outboard audio interfaces.

  • by Lvivske,

    Lvivske Lvivske Jul 30, 2012 8:21 AM in response to sixfour
    Level 1 (8 points)
    Mac OS X
    Jul 30, 2012 8:21 AM in response to sixfour

    sixfour - for me it's not the onboard sound card. I've experienced the skipping/crackling when using my DAC, so it's happening on the software side before it hits the hardware. (if my understanding of soundcards and DACs is correct)

     

    ivan - no, i dont have sound flower

  • by davidvoy,

    davidvoy davidvoy Jul 30, 2012 4:20 PM in response to Lvivske
    Level 1 (9 points)
    Notebooks
    Jul 30, 2012 4:20 PM in response to Lvivske

    I get crackeling noise when using USB Audio.

    Seems after I upgraded to OS X Mountain Lion some issues came up regarding my USB Audio Interface.

     

    I use a LINE 6  PODxt plugged in through USB and record my guitar using it into LOGIC or other audio aps.  But...  i get this  annoying Crackle noise, and cant figure it out.


    AUDIO EXAMPLE:
    http://soundcloud.com/davidvoy/audio-crackles-issue-davidvoy

  • by Lvivske,

    Lvivske Lvivske Jul 30, 2012 4:46 PM in response to davidvoy
    Level 1 (8 points)
    Mac OS X
    Jul 30, 2012 4:46 PM in response to davidvoy

    is that technically "clipping"? mine problem is nothing close to that bad

     

     

    have you adjusted settings in the audio MIDI setup?

  • by davidvoy,

    davidvoy davidvoy Jul 30, 2012 5:45 PM in response to Lvivske
    Level 1 (9 points)
    Notebooks
    Jul 30, 2012 5:45 PM in response to Lvivske

    Lvivske:
    Clipping, not sure, it just never happened until Mountain Lion. 

     

    What Adjustments are you talking about  in Audio/Midi Setup?

  • by dcollett.seattle,

    dcollett.seattle dcollett.seattle Jul 31, 2012 3:24 AM in response to Ivan Clarke1
    Level 1 (5 points)
    Jul 31, 2012 3:24 AM in response to Ivan Clarke1

    Hi, Ivan.

     

    I did have Soundflower installed. I deleted it, fixed permissions, fsck, etc., rebooted.

     

    Same problem. After 5, 10, 15, ? minutes of watching full-screen video (using DVD Player, VLC, Safari, Firefox, etc.), the sound starts to crackle, then cut out completely.

     

    About half the time, the video stops also.

     

    I've kept Activity Monitor open all the time, but the only significant activity is DVD Player at 30-45% CPU while playing a movie.

     

    A reboot fixes everything, but after a few minutes of full-screen video, the problem returns.

     

    David

  • by IBurchett,

    IBurchett IBurchett Jul 31, 2012 3:32 AM in response to tttxx
    Level 1 (0 points)
    Jul 31, 2012 3:32 AM in response to tttxx

    Glad I found this thread as I've been struggling with this since my upgrade.

    I first noticed the issue when gaming when after about 15mins I got the odd cursor jump which turns into stuttering when scrolling. It gets progressively worse and the sound stutters too. After approx 30 mins it's like I'm watching a slide show at 1 frame per second with the confusion of the mouse still operating on a delay!  It sort of feels like a gradual memory leak..?

    I then noticed it when streaming video which I first put down to Internet lag.

     

    Very unimpressed tbh. Slightly concerned reading the RAM question - I have 8gb of 3rd party RAM on board, is it likely to be an issue?

     

    Will file a bug report too

  • by dcollett.seattle,

    dcollett.seattle dcollett.seattle Jul 31, 2012 3:41 AM in response to IBurchett
    Level 1 (5 points)
    Jul 31, 2012 3:41 AM in response to IBurchett

    I doubt if it is 3rd party RAM. All my RAM is from Apple, and I've tested it.

     

    Never had any problems with sound since 10.0 (Cheetah) was released in 2001.

     

    I installed M.Lion the day it was released, and instantly started having these major sound glitches and system slowdowns.

  • by sixfour,

    sixfour sixfour Jul 31, 2012 3:43 AM in response to IBurchett
    Level 1 (0 points)
    Jul 31, 2012 3:43 AM in response to IBurchett

    Definitly not about rams. My friend has the same 3rd party rams, same system, bought at the same day, but not experiencing this sound problem like I do.

  • by strat4ed,

    strat4ed strat4ed Jul 31, 2012 7:25 PM in response to davidvoy
    Level 1 (0 points)
    Jul 31, 2012 7:25 PM in response to davidvoy

    Davidvoy, I have exactly the same problem on a new macbook air mid 2011 and on my faithful 2007 macbook pro.

    The second after upgrading to ML, sound monitoring while recording through my podxt on logic or garage band became completely crackled  on both macs, I have plugged the podxt through the audio input on the macbook pro and it works although I have a lot more background noise and bad distortion while recording at the volume I was recording through the USB. I guess they have messed up the audio-midi through USB but I don't know where to call or email to file for that bug... any advice ?

  • by davidvoy,

    davidvoy davidvoy Jul 31, 2012 7:42 PM in response to strat4ed
    Level 1 (9 points)
    Notebooks
    Jul 31, 2012 7:42 PM in response to strat4ed

    Im frustrated too, I hope apple fixes this RIGHT AWAY.

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