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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

Feb 28, 2013 10:37 AM in response to tttxx

I finally got proof for the sound stuttering issues I refered to in my original post.

They are less common now but still regularly occur under load or while playing games.

OS 10.8.2, fresh Mountain Lion web install on fast SSD, no soundflower installed, just very common regular applications


In this video you can see normal window dragging how it is usually and should always be (and always was in Lion).


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


And here is a video recorded after the stuttering began, while watching a stream in full screen mode. I minimized the video and startet dragging a window around. You can clearly see mouse movement spikes, the window jumps, the sound stutters.

This also happens when e.g. playing Diablo 3 while listening to some music. My mouse jumps around, but it is not of the same kind as when you have a bad latency or low fps.


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

Mar 1, 2013 5:05 AM in response to tttxx

Well, that video shows the problems in a nutshell. It's a shame that after almost 8 months they still havent released a fix for such a crucial component to the general public.


I actually was convinced 12D68 would be the last beta before GM, so I decided to install a fresh copy of ML myself so I'd be able to update to 10.8.3 right away during release and have the system ready for the Sim City release on March 5th.Turns out they released yet another beta (12D74) a couple of hours ago.


Guess i'll have to switch time machine off again and go back to SL for a couple more weeks if they havent released the GM by March 5th.


I have to hand it to apple, they sure know how to $*&# people off

Mar 6, 2013 10:11 AM in response to rmbpfan

rmbpfan wrote:


I hear Snow Leopard is good for audio unless you have spent over 3000 EUR on a retina mbp which doesn't run SL..Do not buy this machine for pro audio use 😟

Last sentence is really funny.


We run a professional recording studio and just swapped our Nehalem 16 Core WITH ProtoolsHD|3 with ONE rMBP that barely reaches 30% of where the other system would max out !!!


We replaced a $30,000 ProtoolsHD Sytem with a $3000 rMBP and it was for the BETTER and SMOOTHER...


So you can imagine that your last statement really made me laugh my A off

Mar 6, 2013 10:17 AM in response to Studio Engineer

Studio, I think he was meaning those machines affected by the audio stutter aren't good for professional use.


Apple executive relations reached out to me again this week trying to calm the matter. It was ironic considering I gave them time to resolve the matter, now it's in another party's hands. I take revenue and business losses seriously, even though apple seems content to sit idle or delete posts on here with regularity. But their stock prices, product sales forecasts, and other indicators seem to show Google is getting a big leg up on Apple. You have to love a little friendly competition.

Mar 6, 2013 10:20 AM in response to Studio Engineer

Studio Engineer wrote:


rmbpfan wrote:


I hear Snow Leopard is good for audio unless you have spent over 3000 EUR on a retina mbp which doesn't run SL..Do not buy this machine for pro audio use 😟

Last sentence is really funny.


We run a professional recording studio and just swapped our Nehalem 16 Core WITH ProtoolsHD|3 with ONE rMBP that barely reaches 30% of where the other system would max out !!!


We replaced a $30,000 ProtoolsHD Sytem with a $3000 rMBP and it was for the BETTER and SMOOTHER...


So you can imagine that your last statement really made me laugh my A off

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

Mar 6, 2013 11:06 AM in response to BarrettF77

BarrettF77 wrote:


Studio, I think he was meaning those machines affected by the audio stutter aren't good for professional use.


Apple executive relations reached out to me again this week trying to calm the matter. It was ironic considering I gave them time to resolve the matter, now it's in another party's hands. I take revenue and business losses seriously, even though apple seems content to sit idle or delete posts on here with regularity. But their stock prices, product sales forecasts, and other indicators seem to show Google is getting a big leg up on Apple. You have to love a little friendly competition.

The Retina has OTHER problems which I would love for apple to fix... Like Bluetooth and WLAN not being able to run concurrently unless one has a dual band router & Dead Pixels, Etc etc etc. But Performance wise thing is the best CPU has ever brought about. And for audio it is fantastic. And since it the rMPR literally pays out bills and we do 24 track-simul. recording with 24 mics and NO problems.. I found that guy's last sentence hilarious...


Competitions is great and I embrace that.... Apple seriously need to step up their game since Mr. Jobs left, prematurely. The guy currently in the driving seat over there on infinite loop has a TOUGH job trying to walk in Job's footsteps. Last video conference was a disgrace... No one on this planet can copy SJ.... TC tries and fails.. He needs to be himself !

Mar 6, 2013 11:05 AM in response to kallisti

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.

Mar 6, 2013 6:58 PM in response to Studio Engineer

Studio Engineer wrote:


Last sentence is really funny.


We run a professional recording studio and just swapped our Nehalem 16 Core WITH ProtoolsHD|3 with ONE rMBP that barely reaches 30% of where the other system would max out !!!


We replaced a $30,000 ProtoolsHD Sytem with a $3000 rMBP and it was for the BETTER and SMOOTHER...


So you can imagine that your last statement really made me laugh my A off


Name of your studio, if you would, please? It would be well worth booking an hour of time to see such a screaming system in action.


Perhaps you could make a youtube video for Apple?

Mar 7, 2013 10:34 AM in response to Leslie Bell

CPU wise i have no complaints. But stability wise I have heard Snow Leopard does a better job for audio, but I can be mistaken afterall I have been experencing clicks and pops, when adding removing devices etc in ableton, but after talking to support it seems to be 'normal' behavior for live, so if you would do a live set you would not be able to add/remove channels enable/disable devices, you would need a standard template with enough channels and all your effects/processing in place to prevent audible clicks and nasty spikes during playback.. 😕


I'm mostly using an A&H Xone 2D which had trouble running on ML at first so I figured it was OS related..


Anyway I was a 'little annoyed' that after buying the rmbp it apeared unreliable for live performance.. I hope it will behave better now..

Mar 7, 2013 11:34 AM in response to Leslie Bell

Leslie Bell wrote:


Studio Engineer wrote:


Last sentence is really funny.


We run a professional recording studio and just swapped our Nehalem 16 Core WITH ProtoolsHD|3 with ONE rMBP that barely reaches 30% of where the other system would max out !!!


We replaced a $30,000 ProtoolsHD Sytem with a $3000 rMBP and it was for the BETTER and SMOOTHER...


So you can imagine that your last statement really made me laugh my A off


Name of your studio, if you would, please? It would be well worth booking an hour of time to see such a screaming system in action.


Perhaps you could make a youtube video for Apple?


Look, you NEED to read and engage conversation on dedicated fora. There you will find many who has done what we have... This aint no rocket science, Mr. This is professional use of a professional device. You dont get THAT out a the box. You need experimenting (Which a pro facility pays for) to get a system running smooth. Experiments reaching beyond THAT of a youtube video. What is it with folks nowadays... Thinking they could gain 20 years of knowhow by dialing in to youtube. HA.


If you want YOUR device to spit fire... You will have to get down and dirty with it. 🙂

Mar 7, 2013 4:23 PM in response to Studio Engineer

Studio Engineer wrote:


Leslie Bell wrote:


Studio Engineer wrote:


Last sentence is really funny.


We run a professional recording studio and just swapped our Nehalem 16 Core WITH ProtoolsHD|3 with ONE rMBP that barely reaches 30% of where the other system would max out !!!


We replaced a $30,000 ProtoolsHD Sytem with a $3000 rMBP and it was for the BETTER and SMOOTHER...


So you can imagine that your last statement really made me laugh my A off


Name of your studio, if you would, please? It would be well worth booking an hour of time to see such a screaming system in action.


Perhaps you could make a youtube video for Apple?


Look, you NEED to read and engage conversation on dedicated fora. There you will find many who has done what we have... This aint no rocket science, Mr. This is professional use of a professional device. You dont get THAT out a the box. You need experimenting (Which a pro facility pays for) to get a system running smooth. Experiments reaching beyond THAT of a youtube video. What is it with folks nowadays... Thinking they could gain 20 years of knowhow by dialing in to youtube. HA.


If you want YOUR device to spit fire... You will have to get down and dirty with it. 🙂


Nice sidestep. Guess you don't want the business.


Or can't deliver.

Mar 7, 2013 7:39 PM in response to Leslie Bell

What business.... In my world you get pay for what you do. Wire $1000 to my paypal account and I'll make you a youtube video that will show the rMBP recording 48 Tracks simultaneously to the SSD System drive, while having two D-verbs instantiated on each along with a few compressors and EQs, just to make it sweat beyond 40%.


But I can save you the greens. Just try it yourself. If you do the search on the web, instead of acting the fool here, you will find many backing up this CRAZY claim of mine... What you wont find is anyone revealing the days of setting up the device to do so... It aint in NO manual. It is in the upper region of your body.... right behind your eyes... And I believe it is referred to as a brain...


I'm off this thread... But I sincerely hope that you will find your way and that it leads you to more serious sources than youtube.


Lynda.com is a pretty good source for novice to intermediate learning.🙂





PS --- To those having those stutter problems... Start by checking your console for "sandboxd" messages. Those cause havoc to the system. There are plenty of sources causing those. Search google for which files to delete and how to alter what is considered "to be sandboxed" by the OS.

In many cases a reboot into safe-boot, followed by a normal boot will alleviate the problems for a little while. I've been told that 10.8.3 is going to deal with this problem. So lets hope for the best.

Sound stuttering after Mountain Lion install

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