Previous 1 4 5 6 7 8 Next 1,223 Replies Latest reply: Nov 20, 2014 9:27 AM by CT Go to original post Branched to a new discussion.
  • Reactor-Core Level 1 Level 1

    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.

  • Carlo TD Level 3 Level 3

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

  • pepper_chico Level 1 Level 1

    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.

  • IBurchett Level 1 Level 1

    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

  • dcollett.seattle Level 1 Level 1

    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.


  • duntuk Level 1 Level 1

    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:



    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.

  • duntuk Level 1 Level 1

    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.

  • davidvoy Level 1 Level 1

    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.


  • strat4ed Level 1 Level 1

    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

  • Carlo TD Level 3 Level 3

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

  • davidvoy Level 1 Level 1



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

  • Lvivske Level 1 Level 1

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

  • Carlo TD Level 3 Level 3

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

  • davidvoy Level 1 Level 1

    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.

  • Carlo TD Level 3 Level 3

    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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