A number of computers have issues when they awake from Sleep/Hibernate/Standby or even ScreenSaver.. Test it by disabling all of those items and leave the screen and computer active.. If it fixes the issues, then it's a toss-up as to the fix.. Sometimes, installing an updated motherboard/chipset drivers will take care of it.. Sometimes, updating the BIOS fixes the problem, and sometimes, you need to tinker with the "Power Options" in the BIOS and computer settings.

You might even try a different microphone.. The drivers for a different brand might be more compatible and work fine with your system.

On a few computers here, because we needed immediate access after long periods of idle, we simply disabled all the power-saving stuff and left them running all the time.

Hope this helps.