Macbook Audio Echo problem

My MB has suddenly started emitting an echo sound on all audio. i noticed it first whilst using logic and thought i must've had a delay plugin instantiated, which i did not. i then tested on itunes, quicktime player and all other audio generating programs... the echo is on everything. it's not a massive echo, but it is clearly noticeable when i have instruments or drums soloed in Logic or am auditioning sounds in finder. Obviously i cannot continue to produce music on the system whilst this problem remains.
I have bootcamp on the MB also and the problem does not exist when running audio programs in windows.
Any ideas??
aj ok

I'm also interested in the solution to this - I have a similar problem. My audio isn't playign in stereo anymore, but it seems to be a software problem because everything is fine in Windows. I created a test audio file with sound in the left channel only, and it plays out both (although the right channel has significant echo; I'd almost describe it as sounding like a stereo with speakers hooked up out of phase).
Interestingly, I reinstalled the OS a week ago, and the problem was fixed (for a while). Sometime after that, when I was installing software and whatnot, it went back to this weird mono with echo. So, last night I did an archive and install of the OS, and it was fine again - until I ran software update (installing 10.5.7 and the other current fixes). This morning when I rebooted to finish the updates, it's back the way it was. I haven't made any other changes.
I'm wondering if we have the same problem? I'm wondering what software you have installed - to be honest, the only things that I can think of that would mess with audio are iTunes, VLC, Toast, Skype, and maybe Adium? Beyond that, I don't have any particularly exotic installs. How about you? Match anything on my list? Maybe we can narrow this down.
Anyone have any ideas?

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I own the PowerBook G4 high res model and I've noticed this 'echo' effect when listening to my iTunes. I remember creating another account for my sister and from what I've heard so far, her sound did not stutter.
Although unrelated, my system sounds did not work after some time (emptying bin, copy paste sounds etc.) even though in System preferences the option for such sounds was checked.
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it seems that there are faulty output jacks in the macbook and the mac mini
there are two things you can try:
i tried everything and began thinking about what new software i had installed. it was "macam" which enables you to use older webcams on OSX. i needed that to use my webcam on skype.
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The computer starts to become painfully slow. After for example clicking an item in the browser there is a 1-3 second delay before the click actually becomes effective. It's now so hot underneath that I would not want to keep it in my lap. It is hard to use the mouse pointer properly as it does not update in realtime, I have to assume where it will land based on my movements. When scrolling, the spinning wheel icon becomes active. Everything is now happening in slow motion.
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Hi Everybody,
Thanks for your replies to start with.
I have tried to install Coolbook now and has it running. When using 'throttling' and letting it change CPU speeds (I think..) the problem still remains. When watching a video or other demanding task the temperature goes way up. Running a CPUTest (small or big) gets CPU temperatures of up to 84-85 C. Fan of course at 6200rpm all the time.
Right now, I have Coolbook set to 800Mhz and 0.9V. Apps running are Firefox, Skype, Mail and iTunes with no audio playing. CPU temperature at 56 c and fan speed (as usual) at 6200rpm. I can use the computer now. It is still lagging and not very fast at all. Sometimes text appear 1-2 seconds after I have written it on the keyboard.
So Coolbook has made a difference for me, but only when putting the CPU speed down to 800MHz. I wouldn't call reducing the CPU speed to half a 'solution' though and will not keep that as a long term solution. Reducing voltages for higher CPU-speeds 0.9875V for 1600MHz does not work, it still heats up massively.
Have used the MBA for the whole day today and can't recall a single time the fan has not been around 6200rpm except right after boot.
Thanks for the tips on upgrading to 10.5.8. I will try that right away and let you know how it works out.
Have also considered buying some cooling device but just as you say that feels like a bit of a last thing to resort to.
I'm surprised Apple hasn't responded stronger to this. Had this happened in the car industry we would have seen thousands of cars being sent back to the garage to be fixed.
If this only has to do with some specific production weeks then the right thing to do would be for Apple to let those people have their computers either fixed or replaced.

Macbook Audio Echo problem

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