Re: IChat disturbing OS X audio?
Re: IChat disturbing OS X audio?
- Subject: Re: IChat disturbing OS X audio?
- From: Jeff Moore <email@hidden>
- Date: Mon, 1 May 2006 12:12:58 -0700
iChat is just a normal client of the audio subsystem, just like your
app. However, iChat can be CPU intensive to use, obviously for video
chats, but also for audio chats. The reason why is that iChat makes
some attempts at doing things like echo cancellation and
synchronization with the incoming network stream.
A few questions:
Have you been able to reproduce the problem in controlled settings?
What kind of distortion are you hearing?
Have you looked at the HAL telemetry with HALLab when this is happening?
My guess is that your audio gets choppy, most likely due to
overloads. With a dual 2.3 G5, the most likely cause of the overloads
is VM thrashing, but I wouldn't rule out running out of CPU resources.
On Apr 30, 2006, at 11:09 PM, Roni Music wrote:
My application which is an audio recorder is pretty much based on
the ComplexPlayThru and afrecord (Develeloper/CoreAudio/Examples/
AudioFileTools) examples.
It works fine here and for most users but one user (Mac OSX
(10.4.6) on a Dual 2.3 G5) reports that
when he have iChat running,
it sometimes distorts the sound completly. Quiting iChat solves the
problem.
It seems the audio is distorted when it reaches my application in
the InputCallback().
I this a know problem with iChat or could the problem be within my
application?
--
Jeff Moore
Core Audio
Apple
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