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  1. POrandom Application suspended for half a second when Windows XP (32bit, SP3) plays a sound
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    <p>I noticed that the executation of different programs is sometimes delayed for half a second when windows plays a sound on (at least my) multi core machines (not in a virtual box). I tested 3 different computer hardware configurations. Also I have written a small c++ test application to recreate this problem. It just calculates some megabytes of nonsense in the memory and outputs the time, that was spended for this. This is done in a loop, so you continously get outputs. I uploaded this test program (including source code for self compilation, e.g. with GCC 4.7.2 from MinGW, if you fear malware in the executable) to here: <a href="http://daiw.de/share/PrintCalculationTimes.zip" rel="nofollow">http://daiw.de/share/PrintCalculationTimes.zip</a></p> <p>On the following screenshots you can see what happens when a sound is played (via the sound settings in the control panel) while the program is executed: <a href="http://daiw.de/share/PrintCalculationTimesWithoutSound.png" rel="nofollow">http://daiw.de/share/PrintCalculationTimesWithoutSound.png</a></p> <p><a href="http://daiw.de/share/PrintCalculationTimesWithSoundWithAnnotations.png" rel="nofollow">http://daiw.de/share/PrintCalculationTimesWithSoundWithAnnotations.png</a> (It does not happen with every click on the play button, but with multiple clicks it is quite easy to reproduce on my test PCs.)</p> <p>Is this a well known problem? Can someone confirm this observation with the test case I provided?</p> <p>Thanks for your attention.</p> <p>Dobi</p>
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