Re: Intel Dual Core Processors Advance System Clock When Playing Sounds

curt.goodhart@xxxxxxxx wrote:
This is an amazing and troubling problem. It seems to relate to
Windows XP and dual core processors. Simply put, playing a sound
advances the system clock. I've seen extremes of about 6 to 10
seconds per minute. I suspect the problem is XP/Intel/MS related.

Our PC is a double dual core Intel Xeon: a Dell Precision 690 (which
has 2 Dempsey processors, Xeon 5050 series). We are running XP Pro OS
've also seen this on another offbrand PC with a Core 2 processor.
This does not happen on non-dual core processor machines. Executing a
"playsound" command (which is in the winmm.dll) instead of beep has
the same effect (I suspect Beep probably executes a playsound
command).

One way I demonstrate this is with a very simple program in Visual
Basic 6. I have a timer that executes a Beep statement every 20
milliseconds. That's all.

It can also be demonstrated manually by repetitively playing a sound
from the Windows Sounds dialog.

If anyone would like to try to replicate this on your dual core system
I would be very interested in your results. I can be contacted at
curt.goodhart@xxxxxxxxx

It's likely to be an o/s issue, although I lack the right hardware to test that right now. I have never seen it on similar hardware running other o/s software.

To speed response you might start a parallel thread in a Windows group.

--
Bill Davidsen
He was a full-time professional cat, not some moonlighting
ferret or weasel. He knew about these things.
.

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