OS X :: Audio Distortion At High CPU Loads
Dec 13, 2009
I have a Core Duo 2006 Macbook 2ghz, 2gb RAM, running 10.6.2 and whenever the CPU is taxed for an extended period of time, chances are I'll get some audio issues. What usually happens is that the audio will stutter for a second or so, then change instantly into a heavily distorted 'bitcrusher' output. The only way to resolve this is to restart whatever program is outputting audio. So far, this has happened in both Firefox & iTunes.
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May 9, 2010
I've just received a brand new MBP 15 i7 with high res. matte screen. Occasionally the screen becomes sort of distorted by red pixelated shadows that seem to depend on the current wallpaper, and also to some extent stay in the background when white background windows are opened. I have posted a picture taken by camera on Flickr, since a screenshot will not capture it. The funny thing is that I can make it disappear by closing the computer and reopen it again. I cannot force it to appear again though. Is it a driver problem? It doesn't appear on the startup splash screen or on secondary monitors. Here is the photo of the phenomenon: [URL]
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Mar 10, 2010
I'm having issues with audio distortion on my BLUE Snowball mic. This happened in GarageBand on my old MacBook running Leopard as well as my new MacBook Pro running Snow Leopard. I've tested mics, cables, and USB ports. Nothing is consistent.
I'm using 3 mics simultaneously. The distortion doesn't not occur in any predictable manner. Sometimes it's present from the start, while other times it doesn't happen until I'm halfway through my podcast. It's not clipping audio, more-so clicks and interference type noise. I've read some people saying there are often issues with audio drivers and USB, and others saying that it's because the power going to the mics from the USB port is dirty.
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Jan 9, 2010
Sometimes, while watching a streaming video on my Macbook, the audio begins stuttering and tearing (that's the best way I think to describe it). Pausing and refreshing the tab is useless, and, usually, closing and reopening the browser is equally useless. This problem is not limited to just one steaming site -- issues occur on Youtube, Hulu, Megavideo etc... For about ten minutes (though sometimes longer), the audio across all programs on my Macbook does not work properly until the problem mysteriously solves itself.
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Mar 27, 2010
I have a 24" Intel iMac, with the latest version of Snow Leopard. I bought it last July and have AppleCare. For as long as I can remember I have this problem with it:
* Every 30 seconds, almost to the second, the audio from the built in speakers distorts and gets slightly louder. This lasts about half a second then goes back to normal
* It only manifests through the internal speakers, it's fine through headphones
* Rebooting makes it go away temporarily
* I've reset PRAM and SMC to no avail
* I've tried turning Time Machine off to no avail
* I've taken it into my local Apple Service Centre, they couldn't replicate the problem, it only seems to happen in my house (every room I've tried it in is the same)
* I bought an expensive power filter/conditioner, this hasn't helped at all
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Oct 13, 2008
I recently got my MBP and I noticed there's a issue with headphone audio distortion. When I plug in my earphone or headphone without any sound playing, there's a clear whining noise like zi zi zi sound which is really clear, sounds like old 80s radio noise. When I play the music, of course it was covered by the sound of music but it really bugs me out knowing that I cannot listen the pure sound of my music. The volume of this distortion noise would not change while I turn up or down the volume of my MBP. I asked someone professional, he said it's a famous issue of screen frequency disturbing audio in macbook pro.
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Oct 30, 2009
2.2GHz Macbook Pro, OS X 10.5. I've only noticed it for the last few months.
Whenever (usually) I do something which causes a high CPU load, my mouse cursor movement because extremely jerky. For some reason, even ejecting my USB hard drive (which takes about 20 seconds from when I tell it to eject to when it actually removes itself from my Desktop) causes my cursor to start going jerky.
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May 26, 2010
whenever I'm listening to music or watching a video after a while the audio will drop out, stutter, or become horribly distorted. If I pause the video or music for a second then start playing it again the output will be okay for a few seconds to a few minutes then stutter again. If I leave it stuttering the output will either eventually go back to normal or just stay stuttering or muted. Once or twice I've got a 'you need to restart your computer' kernel panic error (log attached/linked to below) and twice my computer has seemingly randomly restarted itself.
I know it's not an issue with my connection as it happens on locally stored files as well as streaming media. I know it's not a hard drive issue as I've had the problem across two different hard drives (I used the Migration Assistant to swap my stuff from one HD to another, presumably bringing across whatever causes the problem). I've had it with two sets of RAM as well. It happens whatever web browser (for streaming media) or music/video player I use for local files. If I restart the computer I get a longer period of time before the stuttering starts, and it gets more frequent the longer I leave my computer running - a RAM issue maybe? These screengrabs where taken either during or shortly after the stuttering had taken place. This top output is after a particularly bad stutter: and here is a log following a kernel panic: [URL]
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Jun 3, 2012
I've installed Windows 7 (64bit) on my iMac (late 2010) and I don't have sound. I am running Boot Camp 3.3 and have already tried downloading the Realtek drivers (high definition audio codec).
Info:
iMac (21.5-inch Mid 2010), Mac OS X (10.7.4)
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Feb 3, 2009
A couple of years ago when I got a tv for my room, my dad built a rack of shelves into the wall, one for my tv, one for my stereo and one for random stuff. It's always been nice, but restricting. I like to move my room around, and My desk is forced to stay right next to that rack to transmit audio to my receiver via a hard wire. Seeing as my iMac has bluetooth built in, I was wondering if it is at all possible to send stereo high quality audio over bluetooth to some sort of receiver that would feed into two RCA plugs... Now, I'm not talking audiophile quality, this is just a $400 sony rig, no crown audio here, but I dont want it to sound like those old 900mhz wireless headphones with all the interference. Is this at all possible? Or am I doomed to either staying put, or running 5' of cable under my carpet?
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Apr 14, 2004
I hope I'm not double posting. Have any of the other new iMac owners experienced weird frequencies coming from external speakers that are connected to their iMacs?
For example: I have a set of studio monitors that are hooked up to my iMac using a firewire audio interface. Whenever I'm copying data I get an extremely high-pitched frequency coming from my speakers that sounds like my hard drive spinning. Also, whenever I'm scrolling or moving the magic mouse I get a loud buzzing coming from the speakers (especially when scrolling). None of this stuff happened with my previous 20" iMac C2D. I have experienced this issue with all three of the 27" iMacs that I have gone through thus far (due to the yellow tint issue). Does this sound like something I'm just going to have to live with. All of these high pitched frequencies are driving me batty!
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Dec 19, 2007
We just updated our G5s here at the lab (QuickTime and Garageband ), and now the sound output is extremely distorted and crackly regardless if its a video on cnn or a song off iTunes. Tried Zapping the PRAM and repairing permissions, even reinstalled QT from the standalone installer on apple to no avail.
Information:
MacBook Pro
Mac OS X (10.5.1)
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Dec 3, 2009
On my Al macbook just recently when I hit Cmd-T to open a tab, safari starts to stutter, beach ball, and a distorted screen image (the size of the browser) appears for 3-5 seconds and the tab finally becomes available. what is going on here and how can I fix it? Never had a problem before and I'm using the latest Safari update.
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Jan 6, 2008
I have made a movie on iMovie HD (using a Mac Book Pro) and have burned it onto DVD using iDVD. When I play the DVD on my TV or another iMac there is distortion during any rapid movement, e.g. a quick moving arm appears jagged and lined. There is also a slight blurriness to the general picture (the sound is faultless). Why this distortion is occurring?
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Jan 28, 2009
My MB started doing this really strange thing where the screen gets all weird and distorted when scrolling. There are photos to show what's going on.
I have 4GB of OWC memory installed, but this was happening before I installed that so I can kind of rule that out.
Has anyone else had this happen, or know what causes it. I've tried all of the usual fixes like a fresh Leopard install and combo updates.
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May 10, 2012
I am having a problem playing some mp4 files through Quicktime. When the video is played in Quicktime (or Pro Presenter 4), portions of the video turn into distorted white blocks that move with the video. It doesn't continue throughout the whole video, but I can't discern when or why it only affects certain portions. It does it every time at those places in the video. I downloaded VLC, and the same exact file plays perfectly fine in VLC and on other computers through various programs. I have only seen this problem on this computer.
Is this a codec issue? How do I fix it? The files in question are mp4 files using h.264 video and AAC audio at 1920x1080 resolution. I can play other mp4s using h.264 and AAC without any problems.
I have only had this problem with one of the companies that we periodically hire to produce videos for us. I'm guessing that it has something to do with the way he encoded the video, but I have no idea what the problem is. It's probably not his fault if it only distorts on this one computer.
Here is what the white block distortion looks like:
Info:
iMac, Mac OS X (10.6.8), 3.2 GHz Intel Core i3, 4 GB RAM
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Apr 9, 2010
what I imagined was a documented 8600GT nVidia issue with my SR MBP (purchased in April 2008 without Apple Care, d-oh), turns out to be a different issue altogether. The display gets distorted and it seems as if the LCD needs a v-sync controller. I have posted a video of it here[URL]. If I move the LCD slightly the distortion will go away. But it inevitably returns after a while. It gets unusable for that period of time. Oddly enough I can go hours without this problem manifesting, and then hours when this problem doesn't go away.
My recourse has been to connect an external monitor to the MBP, and it works great that way. So I am pretty convinced that it is an LCD/Cable issue as well. The Genius seemed to believe it was an LCD issue as well, something about the cable being torn or stretched or something. He quoted an amount ~$650 to get the whole assembly changed. Here's my dilemma: this is my work machine, and I can't afford to have it gone for a few days/week. Is there anything I can try at home before handing it to Apple for repair... like try and reseat the cable... I have opened the MBP in the past to replace the HDD. Should I even bother to get it repaired, if I can't fix it myself, or should I just save the money and get a new MBP?
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Jan 22, 2009
Just got a new white MacBook yesterday (MB403LL/A) and have noticed, that depending on a slight change in viewing angle, pastel colors can get really distorted, even appearing as other colors, e.g., light green->gray and light orange to pink. One example would be Google calendar when editing an event. Looking at the screen in a normal position, the background appears gray, but when slumped down in my chair it looks green (the actual color). Is this a normal problem with MacBooks or could my display be defective? I took a couple snaps with iPhone that didn't turn out to hot but illustrate the point:
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Jun 22, 2010
My two previous older macs have been perfect to me, but this new MBP I5 model is giving so many issues lately. Every once in a while, my computer's graphics (I am assuming) goes crazy, and I get this pixelated distortion that's right in the middle of my screen that's about 2"x5" on my 17" screen. This happened just earlier, while I was using Safari. However, even after closing all of the Safari windows down, the distortion will still be there, and will stay there regardless of what I have or don't have open. Logging in and out will fixes the problem, and everything goes back to normal for the mean time. Any one ever experience similar problems or know what I could do to see what's going or fix it?
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Jun 16, 2009
Does it hurt the computer... If the computer is doing something (watching flash, playing a game) that turns on the fan full speed;Does this hurt the computer? There are a few games I like to play and they turn on the fan at full speed (computer gets hot too, on the bottom.)
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Apr 14, 2010
How does the Antiglare screen look? Does it look cheap and flimsy like the matte screens on the pc laptops?This is my first Mac and i'm looking at going all out and getting the top of the line 15". I know I definitely want the HD screen, i'm just not sure which screen looks better. What about a 5400 vs 7200 rpm hdd? Is this upgrade worth it?
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Apr 25, 2012
My pandora app will not load. I had it on there, did an update via the app store, and in the process it is stuck. The pandora app is gray and has a blue status bar with a message underneath stating "loading". How do I fix this? I have resynced my iphone, but no luck. It tells me it is a purchased app, and I cannot delete it off my phone either.
Info:
iPhone 4S
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Dec 30, 2008
I installed an update for it just a moment ago, and when it rebooted it isn't loading up! It loads the dock, and the 2 icons for the harddrives (OSX and Windows) show up, then it does the spinning rainbow of death and nothing else happens and I can't open up any apps or do anything! I've tried rebooting several times and nothing. sometimes loads up odd and a reboot will fix it, but this time it's not fixing! Any reason for why it does this at all though? There's nothing wrong with my computer and it runs fine when it does load up, but it just gives me difficulty on occasion just starting up though. Now all my icons load up but it freezes when I click on something.
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Aug 10, 2009
Well, my Macbook [white 2,1] has been running at a normal speed and all, but up until a few days ago, my internet has been noticeably slower. I view a lot of pictures and manga/comics online, so when i click to go to the next it loads very slowly, Youtube videos take a long time to load, and buffer every few seconds.
Normally, they would go smoothly and fast, I'm wirelessly connected to my router which hasn't changed and I've been in the same area of my house too. The desktop and other laptop that my family members use don't have this problem either. My family uses a Telus cnnection.
I've already cleared cookies and cache, I went into the Cookies folder from spotlight and deleted all inside it and emptied trashbin.
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Jun 12, 2012
Opening some PDFs in Safari 5.1.7 browser, PDFs appear as gibberish. Example, it will begin:
[code]....
The same PDF link will show up in Firefox just fine. Since Safari is my default, what can I do to view PDFs reliably? I can't find a similar problem anywhere online.
• PDF plug-ins removed from Library > Internet Plug-Ins
• Acrobat Pro 9.5.1; Reader 10.1.3
• OS 10.6.8
Info:
Mac Pro, Mac OS X (10.6.8)
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Sep 27, 2010
I have a MacBook Pro with bootcamp and Windows 7 as well as OS X (unsure of version number at this moment, but think its 10.5). On the Windows 7 side, webpages load quickly in both Firefox 3.6.10 and Internet Explorer 8.0 and I rarely have trouble. On the MAC side, webpages are often unbearably slow to load and often do not load at all or time out or stop halfway through loading. This is both occurring in Firefox (latest version) and Safari (latest version).
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Mar 6, 2009
I use firefox as my main browser and for some reason Gmail only loads around 50% in standard mode with firefox, half the other time I get the loading screen and it just stops loading and I have to click on the load in basic mode becaues it will not load in the standard. This happens around half the time I try to login to gmail and only happens in firefox?
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Apr 23, 2009
Youtube was working just fine on my 09 whitebook the other night. The last thing I did before powering it off was updating Firefox. For whatever reason, it will no longer load Youtube.com. All I see is a blank page while Firefox attempts to bring it up. The same thing happens when I attempt to visit the page via Safari. What's strange is that my Windows machine can access the site with no problem. According to OSX, all my software is current and up-to-date. I tried clearing all private data and restarting the machine but it still does not load.
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Jun 29, 2009
It is a small glitch, but whenever I have a USB flash drive plugged in when I start my Mac iPics loads. I am using OSX 10.5.
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Nov 2, 2008
my new macbook now only loads to a blank blue screen. How do I fix it?
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