Re: Complex Play Thru app fails
Re: Complex Play Thru app fails
- Subject: Re: Complex Play Thru app fails
- From: Shawn Erickson <email@hidden>
- Date: Mon, 31 Jan 2005 10:27:22 -0800
On Jan 31, 2005, at 9:57 AM, Rolf Nilsson wrote:
Hi,
My application is partly based on the ComplexPlayThru sample and works
fine.
Recently one of my custommers complained that the sound "dies" after
about 20 minutes of use and the application needs to be re-started
to get the sound back.
He is using a dual G5 running OS X 10.3.7 with an external speaker(?)
called "SoundStick" by Harman Kardon. The problem only appears
with the SoundStick, not with the internal speakers/line ouput.
Since the recording is not affected I started the bug tracking in th
play thru routines but could not dupplicate the problem.
So I emailed him the the latest version of the ComplexThru app from
the developper samples and it generates the same problem.
The sound dies or sounds very bad. Since the ComplexThru app uses a
ringbufer that stores the sample times, it seems
that the TimeStamps in either the InputProc or the OutputProc becomes
completly wrong after some 20 minutes.
The "Soundstick" is an USB device but does not come with it's own
driver (just plug it in and go).
To repeat, nobody else have reported this problem and I have never
encountered it myself when testing for hours on my G4 with the
internal
sound output or an iMic device.
Thanks for any help
I have Sound Sticks as well and I have had them periodically drop
offline such that sound playback via them dies. The system is running
fine just no sound output. To fix I have simply unplugged and replugged
the USB connection for the Sound Sticks (sometimes have to reselect
them as the sound output device in the sound system preference).
So far I have found no pattern to what triggers them to fall offline...
it my experience it hasn't been related to any particular application.
For me it happen at most once a week and more likely once a month (or
few month) in my experience (I almost always have iTunes playing but
often various sound generating Applications as well).
I have had this issue on PM G5 2GHz and my prior PM G4 Dual 1.42 GHz
system with the same pair of sound sticks on Mac OS X starting with
10.1 up and still with 10.3.7.
-Shawn
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