Stuttering Audio

Ever so randomly about 3 weeks ago my audio started stuttering through itunes. I've done some looking around and discovered the problem was somewhat widespread and have experiemented with all the different possible fixes. Checking off the SafeMode (waveOut only) worked for about a week, but the problem returned.
I can't find any information as recently as the last month or so and am wondering if there has been any new fixes? Has Apple indicated when a fix will be out?
I'd hate to lose iTunes, is there some iTunes clone I could use until Apple fixes the problem at which point I could seamlessly transfer my library information back over to iTunes?

I had experienced the same problem -- every song in my library stuttered, more often at the beginning of the song than later, but certainly throughout. It made no difference if I had purchased the song through the iTunes store or had imported it.
In my case, though, I went into my user/library, opened up itunes/itunes plug-ins, and deleted all the plug-ins, which in my case were audioscrobbler (installed by last.fm), Iconcertcal and Jewelcase, none of which I really use. This completely eliminated the problem for me.

Similar Messages

Stuttering Audio from 10.6.8 Update all Outputs

Hi,
I updated to 10.6.8 and now have stuttering audio using either digital output, headphone output and from the internal speakers so I think something there is a bug.
I tried rolling back 'AppleHDA.kext' using the 'MacOSXUpdCombo10.6.7.dmg' and Pacifist but that didn't help the situation.
Anyone else having similar issues/have an idea for a fix? I don't have a time machine backup with with 10.6.7 unfortunately...

I have a early 2008 macbookpro 2.8 duel with silver keys.
I purchaed the 10.6 disk from the apple store. I've had the machine for years and purchased it refurbished from apple.
I did the erase and install and migrated everything over from external drive, then did update to 10.6.8 and the usb ports still would stop working after a few hours.. Then I read on another apple community forus to reset pram, and pull out the power cable, take out the battery and hold power key for 5 seconds, then restart. that seemed to fix usb issue so far..
But overall my computer seems to be running slower then when using just 10.5.8 and it did not wake from sleep once and I had to force power off and restart.. But maybe its just getting used to 10.6.8. we will see..
Also, on another note, my battery is totally dead, and I can only run computer with power cable.. Will this affect things? it never did with 10.5.8..
Oh, on my erase and install, I just did the simplest version and did not do the full erase to zero using he advanced security measures.. I just did the one where it writes on top of everything..

Apogee Duet FireWire skipping/stuttering audio

I've bought Apogee Duet FireWire back in 2011 when I had another macbook pro and I believe it was OS X Lion powered. The problem started since I updated to Mountain Lion and next upgrades were the same. There was a time when it was not very clean if the drivers at the official apogee's site are fresh enough. But now I have OS X Yosemite and fresh drivers that claim to be for this system. As to hardware, since Apogee had only FW400 wire, later I bought FW800 wire, and then FW800<->ThunderBolt adapter. So now I use this connection: Duet -> FW400/FW800 wire -> FW800/ThunderBolt adaptor -> MacBook Pro. The audio is working normal in 80% of time, but otherwise there are stutterings of the sound. Is there a way to get rid of this problem? Thank you.
Problem description:
Apogee Duet FireWire skipping/stuttering audio
EtreCheck version: 2.1.8 (121)
Report generated 9 Apr 2015 16:22:01 GMT+3
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    MacBook Pro (Retina, 15-inch, Late 2013) (Technical Specifications)
    MacBook Pro - model: MacBookPro11,3
    1 2.3 GHz Intel Core i7 CPU: 4-core
    16 GB RAM Not upgradeable
        BANK 0/DIMM0
            8 GB DDR3 1600 MHz ok
        BANK 1/DIMM0
            8 GB DDR3 1600 MHz ok
    Bluetooth: Good - Handoff/Airdrop2 supported
    Wireless: en0: 802.11 a/b/g/n/ac
    Battery Health: Normal - Cycle count 106
Video Information: ℹ️
    Intel Iris Pro
    NVIDIA GeForce GT 750M - VRAM: 2048 MB
        Color LCD spdisplays_2880x1800Retina
        2757 spdisplays_1080p
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 0:58:24
Disk Information: ℹ️
    APPLE SSD SM0512F disk0 : (500,28 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) / [Startup]: 499.07 GB (6.42 GB free) (Low!)
            Encrypted AES-XTS Unlocked
            Core Storage: disk0s2 499.42 GB Online
USB Information: ℹ️
    Apple Internal Memory Card Reader
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Inc. BRCM20702 Hub
        Apple Inc. Bluetooth USB Host Controller
    Wacom Co.,Ltd. Intuos5 touch S
    Apple, Inc. Keyboard Hub
        Apple, Inc Apple Keyboard
Firewire Information: ℹ️
    Apogee Electronics Duet 400mbit - 400mbit max
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
        Apple Inc. Thunderbolt to FireWire Adapter
Configuration files: ℹ️
    /etc/sysctl.conf - Exists
Gatekeeper: ℹ️
    Anywhere
Kernel Extensions: ℹ️
        /Applications/DAEMON Tools Lite.app
    [not loaded]    com.disc-soft.DAEMONTools.VirtualSCSIBus (1.0.2 - SDK 10.8) [Click for support]
        /Applications/Parallels Desktop.app
    [not loaded]    com.parallels.kext.hidhook (9.0 24172.951362) [Click for support]
    [not loaded]    com.parallels.kext.hypervisor (9.0 24172.951362) [Click for support]
    [not loaded]    com.parallels.kext.netbridge (9.0 24172.951362) [Click for support]
    [not loaded]    com.parallels.kext.usbconnect (9.0 24172.951362) [Click for support]
    [not loaded]    com.parallels.kext.vnic (9.0 24172.951362) [Click for support]
        /Library/Extensions
    [loaded]    at.obdev.nke.LittleSnitch (4234 - SDK 10.8) [Click for support]
    [loaded]    com.Apogee.driver.DuetFWOverideDriver (1.4.4 - SDK 10.9) [Click for support]
    [not loaded]    com.wacom.kext.ftdi (1 - SDK 10.10) [Click for support]
        /Library/Extensions/HuaweiDataCardDriver_10_9.kext/Contents/PlugIns
    [not loaded]    com.MBB.driver.MBBACMData (5.01.03 - SDK 10.8) [Click for support]
    [not loaded]    com.MBB.driver.MBBActivateDriver (5.01.03 - SDK 10.8) [Click for support]
    [not loaded]    com.MBB.driver.MBBEthernetData (5.01.03 - SDK 10.8) [Click for support]
        /System/Library/Extensions
    [loaded]    com.Cycling74.driver.Soundflower (1.6.6 - SDK 10.6) [Click for support]
    [not loaded]    com.Megafon1KY.driver.YotaDevices (1.0.3) [Click for support]
    [not loaded]    com.Quanta.driver.QuantaDriver (1.0.3) [Click for support]
    [not loaded]    com.Yota1KY.driver.YotaDevices (1.0.3) [Click for support]
    [not loaded]    com.anydata.driver.AnydataUSBCDC (4.0.2) [Click for support]
    [not loaded]    com.anydata.driver.AnydataUSBCDCACMData (4.0.2) [Click for support]
    [not loaded]    com.wacom.kext.wacomtablet (6.3.11 - SDK 10.9) [Click for support]
    [not loaded]    com.wetelecom.driver.WeModem (1) [Click for support]
    [not loaded]    net.code4mac.driver.C4MUSBCDC (4.0.2) [Click for support]
    [not loaded]    net.code4mac.driver.C4MUSBCDCACMData (4.0.2) [Click for support]
Startup Items: ℹ️
    HWNetMgr: Path: /Library/StartupItems/HWNetMgr
    Startup items are obsolete in OS X Yosemite
Launch Agents: ℹ️
    [running]    at.obdev.LittleSnitchUIAgent.plist [Click for support]
    [running]    com.ApogeePopup.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.huawei.mbbservice.plist [Click for support]
    [loaded]    com.roox.YotaAccess.Agent.CheckTrash.plist [Click for support]
    [loaded]    com.roox.YotaAccess.Agent.plist [Click for support]
    [running]    com.wacom.wacomtablet.plist [Click for support]
    [running]    HWPortCfg.plist [Click for support]
Launch Daemons: ℹ️
    [running]    at.obdev.littlesnitchd.plist [Click for support]
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [running]    com.aladdin.aksusbd.plist [Click for support]
    [running]    com.aladdin.hasplmd.plist [Click for support]
    [running]    com.DuetDaemon.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [loaded]    com.lsreset.plist [Click for support]
    [running]    com.roox.YotaAccess.Service.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.bittorrent.uTorrent.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Internet Plug-ins: ℹ️
    Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Flash Player: Version: 16.0.0.305 - SDK 10.6 Cannot contact Adobe
    AdobePDFViewer: Version: 10.1.1 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    WacomTabletPlugin: Version: WacomTabletPlugin 2.1.0.6 - SDK 10.9 [Click for support]
    JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
Safari Extensions: ℹ️
    Open in Internet Explorer
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Flip4Mac WMV [Click for support]
    WacomTablet [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         6%    WindowServer
         5%    coreaudiod
         2%    studioapp
         1%    Little Snitch Agent
         1%    Google Chrome
Top Processes by Memory: ℹ️
    292 MB    Google Chrome
    258 MB    Skype
    206 MB    studioapp
    172 MB    mds_stores
    137 MB    WindowServer
Virtual Memory Information: ℹ️
    10.31 GB    Free RAM
    4.47 GB    Active RAM
    1.06 GB    Inactive RAM
    1.32 GB    Wired RAM
    2.23 GB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Apr 9, 2015, 03:23:29 PM    /Library/Logs/DiagnosticReports/WacomTabletDriver_2015-04-09-152329_[redacted]. crash
    Apr 9, 2015, 03:23:19 PM    Self test - passed
    Apr 8, 2015, 11:20:34 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/Adobe Photoshop CS6_2015-04-08-232034_[redacted].crash
    Apr 7, 2015, 04:24:04 PM    /Library/Logs/DiagnosticReports/Adobe Illustrator_2015-04-07-162404_[redacted].hang
    Apr 7, 2015, 04:19:53 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/QuickLookSatellite_2015-04-07- 161953_[redacted].crash
    Apr 7, 2015, 04:19:38 PM    /Library/Logs/DiagnosticReports/WacomTabletDriver_2015-04-07-161938_[redacted]. crash
    Apr 7, 2015, 04:13:24 PM    /Library/Logs/DiagnosticReports/Skype_2015-04-07-161324_[redacted].hang

I just started having problems with my Duet this afternoon and found this thread so I thought I'd give a shout out to you guys to see if you have any ideas before talking with the company....
I've had my Apogee Duet since about feb and never had any problems until this afternoon. For some reason the Duet doesn't seem to want to interface with my computer at all anymore. When plugged in, the lights light up on the Duet however under system profiler I get the "unable to list firewire devices" error msg. Under the Sound tab in preferences, the Duet is not listed as an available I/O. In the Apple Midi Setup or whatever it's called in utilities, the icon for the Duet is still there but it doesn't show it as online. I can still press the big button and the little green light cycles through input 1/input 2 yada yada yada, but the computer doesn't seem to see it. When I open up Maestro, both the control and mixer screens are completely blank. I've tried resetting the unit (holding button down for 5 seconds), using different firewire cords, and finally uninstalling and reinstalling the Maestro software (using the Duet software - May 2008 link on apogees site) and none of these things solve the problem. I haven't had a chance to plug in another FW400 device into my Macbook Pro to see if it's a problem with the port, but I get the same result with the Duet on my MBP and my G5 PPC tower, which leads me to believe it's a problem with the unit. Also, since it's bus-powered, the lights wouldn't light up if the ports on the computer were fried, right?? Has this happened to anyone else?? Any ideas on how to fix it before calling up Apogee?? Any help would be greatly appreciated!

RE: Macbook Stuttering, Audio Distortion

FYI
As discussed in Macbook Stuttering, Audio Distortion,
The solution to this problem is as follows:
The fix is to blow out nearly four years of dust (in my case), using the instructions given here (for replacing a fan...)
http://www.ifixit.com/Guide/Repair/Installing-MacBook-Core-2-Duo-Fan/522/1
You don't need to remove the fan, but go as far as removing the keyboard, and then you can simply use an air-duster to remove every bit of dust you can find.
If your macbook's heatsink (as in my case) was cleaned by a professional in Apple Store, and you still keep having problems with youtube, ichat, skype and have stuttering, audio and video distortion and your 2+ghz intel macbook behaves as if it's an early iMac G3 - you have to do all steps described at ifixit.com.
When I have taken out my macbook's fan (the heatsink was perfectly sterile) I have found a 5mm thick layer of compressed dust blocking 97% of the air exit.
Removing the blockage has helped and my macbook is operating like it's new.
PS: It's sad that people at Apple Store do not do their job properly.

Your processor is momentarily saturated. It's not really a 'defect' that is covered under warranty.
Flash is a widely-known resource hog. It's one of the reasons that Steve Jobs has 'banished' Flash from iPhones and the new iPad, and uses H.264 format video.
Have you also noticed that the fan becomes loud when this is happening? Almost any time the fan starts running at high speed, it's because your processor is working hard and needs additional cooling.
If you look at Activity Monitor when the stuttering occurs, you probably have a combined CPU utilization of the top two or three processes running of more than 100%.
It's also quite possible that the Free memory 'green slice' of the of the System Memory pie chart is quite tiny.
Work-Arounds
1. Run fewer processes/programs. Close and Quit every application that doesn't need to be running while you're watching Flash.
2. Try another browser. Some are better than others at running Flash. I use Safari primarily, but Firefox, Google Chrome, and Opera are also available.
3. Add RAM memory, especially if you still have just 1Gb RAM memory installed. Upgrading to 2Gb or 4Gb (MacBook 2,1 actually only recognizes and utilizes up to 3Gb) will help somewhat. It doesn't cure the processor saturation, but it does give the programs running more 'breathing room' until it reaches the saturation point.
4. ClickToFlash gives you options for how Flash is handled. Free download here --> http://rentzsch.github.com/clicktoflash/
5. H.264 format videos may be less processor intensive.
6. Buy a new Mac with a faster processor and more RAM. Even a 2.26Ghz MacBook Pro does much better than the 2007 2.16, because it uses a low power microprocessor, has 2Gb RAM standard, has a more advanced video chipset, and an unibody aluminum case to help dissipate heat.

Stuttering audio from airport express...

I installed my first airport express yesterday. Had some problems: my main computer couldn't load the Airport Utility (see http://discussions.apple.com/thread.jspa?messageID=7132922&tstart=0), and I've gotten things configured through another computer but I'm getting lots of stuttering audio when I attempt playback.
There's a pattern to it: the song starts fine, and then about 3 seconds in it starts stuttering. A buffering issue?
No problems on the network that I'm aware of.
I tried setting Quicktime to "safe mode waveout", but no help.
Any tips?

Typically, "stuttering" can be a result of either low signal strength or high signal noise values, or both.
It is very possible that you may have some form of Wi-Fi interference in the immediate area that is preventing your AirPort Express Base Station (AX) from getting a good clean signal.
I suggest you perform a simple site survey, using utilities like the following to determine potential areas of interference, and then, try to either eliminate or significantly reduce them where possible:
For Macs:
o MacStumbler
o iStumbler
For PCs:
o NetStumbler
o WiFi Manager

Stuttering Audio on Pavilion DV-8333ea

I am trying to solve problems for a friend with the machine in the subject. Firstly the background -
My friend was having an issue with a virus so stupidly ran HP PC repair option and wiped all their information I have retrieved all their missing data using various tools however I have a problem the restored system had what I can best describe as stuttering audio whether system sounds/music web pages etc. also I get stuttering movement with all mouse's whether touchpoint or external
Firstly I ran a complete factory install now that I had the data and when it was complete stuttering audio problem was still there updated all drivers from HP website and problem remains ran windows update and did all updates and still a problem.
I then decided to do a clean install from a Windows XP Disc with all drivers and updates and the problem remained. So I thought I would have a crack with Windows 7 just in case it was something to do with XP when done no audio in device manager exclamation mark at this point mouse ok so installed drivers from HP and guess what? I then got sound but still stuttering and mouse problem returned.
At this point I ran a PCLinuxOS Live CD on the system and the sound and mouse/touchpoint works perfectly so to my mind it cannot be a hardware problem and has to be driver based.
I have now reinstalled XP and up to SP3 with all updates and done a clean removal of all audio drivers and then reinstalled current drivers on site for audio but the problem still remains, the touchpoint moves with pauses and thought that it was a seperate problem however when audio drivers are cleanly removed the touchpoint problem goes away so they do seem to be interlinked.
Any help would be greatly appreciated as I am now out of ideas and feel like throwing the **bleep** thing in a skip.

freskagirl,
Try the following steps.
1. Open up device manager.
2. Locate your audio driver.
3. Right click and uninstall the driver.
4. Go to the toolbar in device manager and select "scan for hardware changes."
5. After it completes, reboot the notebook.
Let me know if that resolves the issue or not.
Best of luck!
-Kyle
-------------How do I give Kudos? | How do I mark a post as Solved? --------------------------------------------------------

J k l keys play stuttered audio

This is really frustrating. In the manual it says this (paraphrased) on page 300:
"Using the J, K, and L Keys to Hear Subtle Details
When an audio clip is displayed in the Viewer, you hear a fragmented version of the
sound as you drag the playhead...To hear audio more clearly as you move through it at different speeds, use the J, K, and L keys to play your clip in the Viewer. Unlike the scrubber bar, which skips samples to
give the illusion of faster playback at the cost of stuttery-sounding audio, the J, K, and L
keys actually shift the pitch of the audio you’re playing back, enabling you to hear all
the subtle details of the audio at various speeds, both slower and faster than real time."
I cannot get my machine to do this, it just plays stuttered sound, no speed/pitch shift, which would be really helpful when you need to understand what is said, but want to skim through fast (ie a long VO session). I have searched all over the manual and prefs for something, no luck. Any ideas?

I cannot get my machine to do this, it just plays
stuttered sound, no speed/pitch shift, which would be
really helpful when you need to understand what is
said, but want to skim through fast (ie a long VO
session). I have searched all over the manual and
prefs for something, no luck. Any ideas?
As Jerry said, it only supports a fixed 50% speed/pitch reduction. Not a scrub, more of a "slo-mo" mode.
If you get stuttered audio while doing this, it means your audio interface hardware and/or its associated Core Audio drivers are not suitable for the task. This is not an uncommon problem with cheap interfaces.
G5 QuadPPC2.5, Ram:12.5g, Magma PCIe-PCI expansion Mac OS X (10.4.7) 2X Hammerfall DSP Digiface+Multiface, Digi 002r, 4X UAD-1

Stuttering audio with itunes 7.0

what's going on with my itunes audio. now whnever itunes is playing audio, if I open any other app, i.e. net browser, and use the scroll or perform any other activity, my audio starts skipping out - badly. never did before the 7.0 upgrade????
direct x, drivers, everything up to date.
thanks!

Ok. After alot of frustration and late night experimenting I have found that controlling my page file size has seemed to correct my "stuttering audio" with iTunes 7.0. My pagefile.sys had swelled to 4 times it's normal size after the upgrade.(?) I can't prove this or tell you why it happened. All I know is setting my page file sizes to 100-800 (min.& max. respectively) my system response while having iTunes open along with other apps has improved 100%. It hasn't skipped once after re-creating all of the instances that had once brought my audio to a screaching halt.(literally) It may be helpful to note that my system currently has 2GB of ram. So setting the page file to these lower settings has not had any negative effects when running Cubase SX or my video editing software. No, I'm not an expert nor do I claim any authority in the computing industry whatsoever. Just thought I'd share my experience with others.
Steve

Stuttering Audio On Speakers

Hi!
I own a HP Pavilion dv6-3225tx notebook. I have been experiencing stuttering audio problems when i try to play audio through speakers. However, the headphones do not experience this problem. Please help.

Just noticed my MP3s are stuttering too...
EDIT
Rather than bumping this up with a new post here's an update. Not sure if a software update helped, but I completely forgot about this issue; all has been fine since!
Last edited by jsteel (2012-01-17 17:26:49)

PLEASE HELP - STUTTERING AUDIO

This could be a long one so I apologize. I am building a slide show by importing/dragging photos into iMovie using various transitions between them. I have well over a hundred photos. I also adjusted the length of these pictures in iMovie. I added audio from iTunes and used iMovie to trim the audio I needed to fit the individual picture or pictures. Everything was going great until approx 20 minutes into the video - it started getting real slow when using various commands and then the recently added audio would stutter once in a while. I kept adding audio and the stuttering got much worse until NOW ALL OF THE AUDIO HAS A TERRIBLE STUTTER.
I emptied the iMovie trash, I ran Onyx to clean the computer, I ran the Activity Monitor on this Movie and a few others that work perfectly (this is the only one I'm having the audio stutter on).
Obviously I do not understand The Activity Monitor:
Movie with stuttering audio = (31 minutes - 7 GB), many transitions, photos and audio pieces (audio on both tracks) (all worked great for a while).
CPU= 16% at idle AND 165% running (how do you use 165% of the CPU???
REAL MEMORY= 185 MB at idle AND 187 MB running
VIRTUAL MEMORY= 514 MB AT IDLE AND 598-854 MB RUNNING
These next Activity Monitor stats are from a very comparable iMovie that works perfectly.
Movie with great audio = (33 minutes - 6.7 GB)
CPU= 16% at idle AND 115% running (again how do I use 115% of CPU??)
REAL MEMORY- 176 MB at idle AND 197 MB running
Virtual Memory= 504 MB at idle AND 540 MB running
OS 10.4.10 - Dual 1.42 GHZ - 1 GB DDR SDRAM - IMovie HD
I sure hope you can help - I have many, many, many hours into this project that I want to show at my 50th High School Reunion.
Thanks
Wally

First, you are probably not doing anything wrong, nor is your computer malfunctioning.
This is a well-known problem, usually having to do with the type and amount of audio that you are adding. Karl Petersen has taken the time to offer a variety of work-around options.
See this very long thread for more information to assist you. Read and heed anything Karl has posted:
http://discussions.apple.com/thread.jspa?threadID=534252&start=0&tstart=0
If you are nearly finished with the editing except for adding audio, and if you have the drive space, you can 'share' the movie as QuickTime, Full Quality. After the quicktime movie has been created, open a new iMovie project and import that quicktime movie into it. You can then add audio and you should not have much stuttering. The movie will be all one long clip incorporating all the tracks from your original movie. You CAN do more editing, but it is a bit more complicated.
Also, for me, even if my movies have audio skipping/stuttering, and even video stuttering, the resultant burned DVD has always come out fine.
You can also 'share' the movie back to your camcorder and reimport it into a new iMovie project.

Just upgraded an iMac with 4GB Memory and Intel Processor from 10.6.8 to Mavericks and Quicktime plays m4v files with stuttering audio

I just upgraded an iMac with 4GB Memory and 3.33 Ghz Intel Core Duo Processor from 10.6.8 to Mavericks. I now have Quicktime 10.3 which plays m4v files with stuttering audio. This is a nightmare as I use Quicktime a lot in my research. I have seen similar threads but so far only reporting the problem. For now I have installed Quicktime Player 10.7 (which appears in utilities, leaving Quicktime 10.3 in the main applications list) which plays the same videos with no problem, but it would be good to know if anyone has managed to find a workaround at all, or know if Apple have plans to do anything about it?

Slow performance after installing Yosemite on an older Mac is often caused by inadequate memory. Although you can install the upgrade on a Mac with 2 GB of memory, experience has shown that at least 4 GB is needed for full performance.
Select About This Mac from the Apple menu. If you have less than 4 GB of memory, and your model has upgradable memory, install as much as it can take, or at least that much. Any reputable RAM vendor will have a web form in which you can select the Mac model and be directed to compatible parts.

Video stuttering, audio fine. Any ideas or is it just a bug?

I've got a 160Gb box running the latest software. When watching movies which have been ripped with handbrake and are stored locally, they often become a stuttering unwatchable mess. The audio continues to play without any problems though.
These are movies that have played fine in the past and will occassionally play without any problems. However, once they start to stutter, that seems to be them knackered for a while and no reboots will fix the problem.
This problem has been there for a while with the box but is definitely worse since the latest software updates.
While these are movies running from the internal HDD, the box is connected via Ethernet cable to an Airport Extreme which is then getting the rest of its content wirelessly from an iMac which is connected by Ethernet to another AEBS upstairs.
So, any ideas? Its a shame because when the box works its fantastic, but between this and the problem with it hanging on the Apple logo, its starting to become a real PITA.
Thanks.

"While these are movies running from the internal HDD, the box is connected via Ethernet cable to an Airport Extreme which is then getting the rest of its content wirelessly from an iMac which is connected by Ethernet to another AEBS upstairs."
Could be your network setup. If you are using more than router then all secondary routers should be placed in bridge mode(even if using ethernet) then configure wireless settings.

HP 15t Laptop - buzzing and stuttering audio

I ordered an HP 15t laptop through the HP website and I've had it for a little over a month. Shortly after I started using it, like maybe a couple of weeks or so, I started having problems with my audio. No matter what I'm doing, whether it's listening to music or watching a video, the sound will buzz or screech or be interrupted by bursts of static intermittently. It's even happened with simple things like notification sounds. It seems to do it more when I'm browsing the Internet, and does not change whether I'm using headphones or listening through my computer's speakers.
I've run troubleshooting on my audio and checked to make sure my audio drivers are updated; troubleshooting hasn't turned up any problems and my audio driver is up-to-date. I have tried changing the sample rate on my speakers, which seemed to work for a few days but then afterward I started having the same problems.
I really would appreciate some help with this issue. HP has been good to me in the past and I'd hate to think this company is starting to let me down now.

Hi there @KGyork81
Welcome to the HP Support Forums! It is a great place to find the help you need, both from other users, HP experts and other support personnel.
I understand that you are experiencing some audio, breaks, stutters, and screeches. I am happy to help you with this.
Pardon the pun, but from the sound of it... and from your description, I think the issue is more about system latency. Probably a situation where several programs or processes are consuming system resources, resulting in a bit of lag, which the audio system is translating into the static and breaks that you are hearing. The cause could be due to too many applications running in the background, or even malicious software inadvertently install while roaming the internet.
Also, please post the full product number for your notebook. See the following, if you need help with that information.
How Do I Find My Model Number or Product Number?
These two pages have many useful methods, and things that can be adjusted, or looked for, that could definitely reduce if not fix the problem you are having. Try them out and let me know if it helps or not.
HP PCs - Windows 8 stops responding or becomes very slow after connecting to the Internet
HP PCs - Resolving slow system performance (Windows 8)
Malygris1
I work on behalf of HP
Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
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Stuttering Audio from Capture Ingest

I have been having a problem for a while now. When ingesting a tape or direct line, sometimes the audio on the record will begin stuttering. At a seemingly random point, the audio of the record will begin to loop a 1 second bite over and over until the record is complete. Confirmed it is the capture by playing the clip in other programs. Odd thing is the real time playback as it is capturing will sound fine. I end up knowing there is a problem when the capture is complete, because the "Save Captured Clip" window will fail to pop up when it reaches the out point. Instead it will continue to record beyond the set out point.
There is no consistency where this audio fail happens. Sometimes it won't even happen at all. This has happened with DVCPRO tapes, Sony HDCAM tapes, and even a studio line cut from our switcher. Any insight or suggestions would be helpful.
Mac OS 10.9.4
Premiere Pro 2014.0.1
AJA KONA 3 10.5.2
AJA Capture Settings:
Pixel Format: MC DVCPRO HD 1080i60
Audio Format: 16 bit LE PCM

Typically, "stuttering" can be a result of either low signal strength or high signal noise values, or both.
It is very possible that you may have some form of Wi-Fi interference in the immediate area that is preventing your AirPort Express Base Station (AX) from getting a good clean signal.
I suggest you perform a simple site survey, using utilities like the following to determine potential areas of interference, and then, try to either eliminate or significantly reduce them where possible:
For Macs:
o MacStumbler
o iStumbler
For PCs:
o NetStumbler
o WiFi Manager

Windows 7 (64bit) itunes choppy stuttering audio playback

Hi All,
I'm new to these forums so apologise in advance if this topic has been covered already....
I recently upgraded my Dell to Windows 7 64 bit and also upgraded iTunes/ QuickTime to the 64 bit version which resulted in audio playback in iTunes stuttering every few seconds. I waited for the latest release thinking it must be a bug which apple are addressing. Just installed it (ver. 10.1.056) but the problems is still there. I’ve tweaked quick time, installed the newest possible audio drivers, for my soundcard nothing makes any difference. If i use windows media player to play my music its absolutely fine , no stuttering , no problems at all. So why can't apple get their act together?
Has anyone else experienced this problem or found a fix? if so please get in touch.
Thanks for reading
Dave

I have a similar problem. I recently got a new laptop with Windows 7 64-Bit. I've started to rebuild my iTunes library and it was all going well. However, I noticed a lot of my files are starting to loop the first second or so of the intro for around 6 seconds before the song plays normally. At the time, I didn't think of this as a problem, but the exact same looping occurs on the iPod itself on the same files, at the same time, everytime.
After deleting the broken files and getting new versions of the same songs, I decided to test them in Windows Media Player first and there was no intro looping. Assuming all was well, I added these files to iTunes, tidied up the song info, added album art and then played the tracks to see if the looping was still gone. Some of the tracks were fine, but others had developed the intro looping. Playing these same files in Windows Media Player again, after running them throgh iTunes, also now has the looping which it previously did not.
iTunes seems to be destroying my files. Is there any way to fix this?
Message was edited by: Walleye87

Stuttering Audio

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