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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 5:48 AM

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Question marked as Top-ranking reply

Posted on Jul 28, 2012 3:22 PM

I am also having this issue as well.


I opened Activity Monitor and noticed that during the stuttering, coreaudiod jumps in CPU usage, often past 5%. I have also noticed graphics lag when this occurs if I'm doing something like watching full-screen video or gaming.


I'm currently experiencing this on mid 2011 iMac 27" as well as a 24" iMac 2009 model I use at work.

1,223 replies

Mar 8, 2013 4:50 AM in response to tttxx

I think some replies on this thread are straying off-topic and not strengthening our case.


This ugly bug started happening while I am not playing any audio or video at all. It is slowing my work down, and I will probably have to go back to a previous OSX. This means spending even more time on backups and reinstalling everything. I've been a long time mac-user but seeing this total lack of patching/updating is frustarting.

Mar 8, 2013 2:04 PM in response to Studio Engineer

Studio Engineer wrote:


kallisti wrote:



which interface(s) are you using? I've been wondering what people with Thunderbolt/USB3 are having success with before I switch over. I've just about had enough of FW800


We use a mix... We have two 4 Rosetta 800 doing all the conversion. The they go digitally into a few RME Fireface 800s... The RME Converters (on this model suck) but its flexibility is grand and it does no conversion. Works a charm. The RMEs are connected via Thunderbolt to FW800 adapters.



Thats good to know, I was sort of holding out for an RME with USB3 comparable to the fireface800's options. I'm currently running Sound Devices i/o and I sure don't wanna downgrade converters. I've been a fan of Apogee ever since they were making Digidesign's guts, so maybe I should bite the bullet when they release a replacement for the Ensemble.

Mar 8, 2013 2:29 PM in response to kallisti

btw everybody should try the safeboot trick. If your mac refuses to safeboot (which many have under 10.8.2) there is a fantastic workaround you can try here:


https://discussions.apple.com/thread/3750015?start=120&tstart=0


Although many of you may not even have to do this if you have the *LATEST* build of Diskwarrior 4.4 (build 1107 NOT 1102) in which case rebuilding the directory of your boot drive may fix a lot of problems.


Most of the issues I was having with my system went away after that. I also had an old 750gig drive that was gradually failing via firewire; this causes havoc for everything.


as usual, zap pram, reset SMC, reboot a few times after that, and always try to reproduce your audio problems without any peripherals attached. I'm running a quad i7 17" with 16gig of ram that's attached to 22 drives in various raid configurations and a buttload of other peripheral devices. It's currently running very smooth with the exception of the bloated pig that is Firefox 19.User uploaded fileUser uploaded file


https://dl.dropbox.com/u/10478471/Side%20A.jpg

User uploaded file

Mar 9, 2013 4:25 PM in response to tttxx

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...

Mar 9, 2013 6:27 PM in response to deluxeczech

Im still having CRACKLE issues when i record from mu LINE6 PodXT plugged into USB.
Never happened UNTIL i upgraded to Mountain Lion.
I also have Dangerous Overheating issues that i HAVE to combat buy running SMC Fan Control.

Mountain Lion upgrade almost dammaged my iMac cause it was overeheating SO BAD it would shut down

automatically and thats when i noticed Extreme Heat issues. Lucky SMC Fan control helps.
NONE of these issues ever happened BEFORE mountain lion, I am very dissapointed.

Mar 9, 2013 7:15 PM in response to tttxx

tttxx wrote:


Hello kallisti,


can you please watch those two videos and then explain in some plausible way, how safeboot could be a potential bug fix?


Also I got no peripherals connected at all!


http://www.youtube.com/watch?v=3uRLzfBldJA&feature=youtu.be

http://www.youtube.com/watch?v=iB_Wmx19iw0&feature=youtu.be



if your computer refuses to safeboot, that should be your first clue


otherwise keep lamenting, its great

Mar 9, 2013 8:15 PM in response to deluxeczech

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

Mar 9, 2013 9:03 PM in response to kallisti

Personally, I am NOT at all too excited about the newer gen. of Apogee converters. Not bad at all but hugely over priced in comparison to MUCH better converters from i.e lavry, lynx etc... Latter two outperforms Apogee latest gen... by far... So does i.e. AVIDs new Protools interfaces.... Might I add Universal Audio Apollo...


Apogee IMO are bygones.... get their older converters for a cheap price on ebay or go with above... And stay MILES clear of their newer designs... Rubbish !!!!! Unless they lower their prices by 80% which would make their quality adhere to pricing !


If you're looking for HighQ... Check out Metric Halo as well... Great Product if your wallet can handle it !

Sound stuttering after Mountain Lion install

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