iTunes stuttering, and don't shoot me--it might involve Core Audio
iTunes stuttering, and don't shoot me--it might involve Core Audio
- Subject: iTunes stuttering, and don't shoot me--it might involve Core Audio
- From: Chris Luth <email@hidden>
- Date: Tue, 9 Aug 2005 03:09:59 -0800
An old customer service adage says that for every one person who
complains, there are 99 others who feel the same way but keep quiet.
I think this is magnified by 100 for computer-related issues.
Well, several of us over on the Apple Discussion board have
encountered a problem where iTunes "stutters"--that is, playback
pauses for an annoying brief fraction of a second. I and a few others
have found that it happens any time there is a spike in disk-writing
activity. (It doesn't have anything to do with CPU usage, as far as
we can tell.) I'm thinking that iTunes doesn't maintain a very large
buffer for data read off of disks.
So why am I submitting this to the Core Audio API list?
Because I've found you guys helpful in the past (I used to lurk a bit
and then unsubscribed when life got hectic).
But more than that, I still harbor some suspicions that it *might*
have something to do with a too-small Core Audio buffer, but I can't
find a way to tweak the overall system audio buffer. (I know you can
tweak the recording buffer in individual apps like Logic Pro and
Soundtrack Pro. I have both--I'm a broadcast journalism major.)
Here's the interesting thing, though: iTunes, as well as QuickTime
Player, DVD Player, RealOne and Windows Media Player all stutter on--
guess what--Internet-streamed media. Surely disk writing wouldn't
affect that...
On my machine, it stutters using the built-in speakers, the line-out,
and on my Mackie Onyx 1220 that I have hooked up via FireWire. (A
huge thank you, Core Audio folks, for creating this wonderful system
that allows me to easily do multichannel I/O!!!)
Check out the thread at the Apple Discussion Boards: http://
discussions.info.apple.com/webx?email@hiddenFmb3mj.8@.68aca9a0
They're also complaining about it over at Mac OS X Hints: http://
www.macosxhints.com/article.php?story=20050623234932431&query=itunes
+skip
Any insights you might have would be helpful.
Thanks,
Chris
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