Re: Complex Play Thru app fails (Doug Wyatt)
Re: Complex Play Thru app fails (Doug Wyatt)
- Subject: Re: Complex Play Thru app fails (Doug Wyatt)
- From: "Roni Music" <email@hidden>
- Date: Fri, 4 Feb 2005 12:32:05 +0100
Hi,
Does this mean that PlayThru problem explained below is a hardware and not a software problem?
Thanks,
Rolf Nilsson
>
> 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).
>
>
Are your SoundSticks connected via a USB hub, including one in the back
>
of a monitor or a keyboard?
>
>
Recently I came across a Knowledge Base article that said (if I
>
remember it correctly) that that is not a reliable configuration; they
>
should be connected directly to one of the CPU's USB ports.
>
>
Doug
>
>
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
>
>
Rolf Nilsson
>
>
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