Sound stuttering after Mountain Lion install

Well, the App Store reports nothing, Software Update reports nothing, and I can't find anything on the web about an update to ML.

I know this doesn't help any of us now, but if you are wondering when Apple might release 10.8.1, read on:

http://bit.ly/Mf78Fl

David

I'm also posting on MR about this, having a similar issue with suttering / skipping since the upgrade

No drastic CPU useage when this happens, and it hits me at random. The PC does feel slower when its happening, though, and it seems to be triggered when swiping or typing or doing anything that requires processing (whereas if I just sit there listening to music, it wont start clipping by itself)

Do you have sound flower installed?

There seems to be an issue concerning this

It happens to a fresh installed system with nothing else installed. Either with the onboard card or later (installed after testing out with the onboard card) installed outboard audio interfaces.

sixfour - for me it's not the onboard sound card. I've experienced the skipping/crackling when using my DAC, so it's happening on the software side before it hits the hardware. (if my understanding of soundcards and DACs is correct)

ivan - no, i dont have sound flower

is that technically "clipping"? mine problem is nothing close to that bad

have you adjusted settings in the audio MIDI setup?

Lvivske:
Clipping, not sure, it just never happened until Mountain Lion. 😟

What Adjustments are you talking about in Audio/Midi Setup?

Hi, Ivan.

I did have Soundflower installed. I deleted it, fixed permissions, fsck, etc., rebooted.

Same problem. After 5, 10, 15, ? minutes of watching full-screen video (using DVD Player, VLC, Safari, Firefox, etc.), the sound starts to crackle, then cut out completely.

About half the time, the video stops also.

I've kept Activity Monitor open all the time, but the only significant activity is DVD Player at 30-45% CPU while playing a movie.

A reboot fixes everything, but after a few minutes of full-screen video, the problem returns.

David

Glad I found this thread as I've been struggling with this since my upgrade.

I first noticed the issue when gaming when after about 15mins I got the odd cursor jump which turns into stuttering when scrolling. It gets progressively worse and the sound stutters too. After approx 30 mins it's like I'm watching a slide show at 1 frame per second with the confusion of the mouse still operating on a delay! It sort of feels like a gradual memory leak..?

I then noticed it when streaming video which I first put down to Internet lag.

Very unimpressed tbh. Slightly concerned reading the RAM question - I have 8gb of 3rd party RAM on board, is it likely to be an issue?

Will file a bug report too

I doubt if it is 3rd party RAM. All my RAM is from Apple, and I've tested it.

Never had any problems with sound since 10.0 (Cheetah) was released in 2001.

I installed M.Lion the day it was released, and instantly started having these major sound glitches and system slowdowns.

Definitly not about rams. My friend has the same 3rd party rams, same system, bought at the same day, but not experiencing this sound problem like I do.

Davidvoy, I have exactly the same problem on a new macbook air mid 2011 and on my faithful 2007 macbook pro.

The second after upgrading to ML, sound monitoring while recording through my podxt on logic or garage band became completely crackled on both macs, I have plugged the podxt through the audio input on the macbook pro and it works although I have a lot more background noise and bad distortion while recording at the volume I was recording through the USB. I guess they have messed up the audio-midi through USB but I don't know where to call or email to file for that bug... any advice ?

Im frustrated too, I hope apple fixes this RIGHT AWAY.

Crazy stuff. I use FireWire interfaces and having the same crackle/static recording on my computer in my pro studio... It hasn't affected playback of tracks recorded before the upgrade to ML, just new recorded tracks. Sounds that are monitored through my interface aren't affected until the point of recording into logic and playback of those tracks. I've had to push sessions and clients aren't happy... I hope Apple can sort it quickly. I weighed up the pros and cons before the upgrade (obviously not from forums) to ML and Logic was the last thing I'd expected not to work, but it's the biggest thing!! If anyone hears anything, please post and let us know.