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PowerBook G4 Dual-Layer SuperDrive: Audio looping/echo problem (#2)
We previously reported on an audio looping/echo problem that is affecting every PowerBook G4 (Double-Layer SD), 15" and 17". The problem causes audio to intermittently stutter, echo, or skip backwards.
As noted in prior coverage, Apple posted a Knowledge Base article addressing the issue, offering the kludgy and often ineffective workaround of running only one audio application at a time.
Previously reported workarounds involve turning off AirPort and deleting the iTunes Helper Login Item.
Readers now offer some additional attempts at solutions.
Turning input volume off MacFixIt reader Vic writes:
"I had good results zeroing the volume of the selected input device (internal microphone) in Sound / Prefpanes."
Stopping then restarting media Another reader writes:
"I have a 3-month old PowerBook Dual-Layer SuperDrive and have experienced this in iMovie during playback. If I stop the movie I am working on and then start again, the problem goes away. It doesn't happen at the same place in the movie when replaying the movie."
Feedback? Late-breakers@macfixit.com.
Previous coverage:
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problem (like a broken record), but it also is freezing up such that it has to be
manually shut down because bothing functions (not USB mouse, trackpad or
keyboard). These things are too expensive to be having all the problems they
do.
What I want to know is whether it could be a motherboard problem. Or is it
something that can be cured by simply resetting PMU or whatever. Or is it
related to OS X 10.4.4.
- by vt75 February 3, 2006 3:24 PM PST
- This is a <b>serious</b> problem that Apple Support has <b>barely
- Like this Reply to this comment
-
(3 Comments)acknowledged</b>.
I've had my 15" PB since mid-October, and I've been having this problem
since the very beginning. Slowly the issue has bubbled up on Apple's
discussion boards, and even on a new website, <a href="http://
powerbookdefect.info">powerbookdefect.info</a>.
But the support reps I spoke with knew nothing of the problem, and after
searching, offered me the meager solution of the KB article that says,
<em>don't run more than one application that uses audio</em>. A fine
solution, that, given that I've even seen this problem occur when I'm
<b>previewing sounds using the Finder</b>!
If you have this problem, <b>please call Apple Support</b> and let
them know! I asked the second support rep, "How can we get some visibility
on this issue, and try to get some technical work going inside the company to
address it?" His reply was, "By calling us, like you're doing now."
And, no, he didn't have any other solution.
I don't think it's unrealistic to expect that my brand new $2,000+ Apple
laptop would be able to play an MP3 at the same time that my mail client is
running...