Consider the following scenario:

• You use a Windows Vista-based computer that has a USB microphone device.
• You open the Sound and Multimedia tool (Mmsys.cpl).
• The computer enters sleep or hibernation.

In this scenario, when the computer resumes from sleep or from hibernation, you cannot use the USB microphone device to record audio.

Note: A built-in microphone may be attached by using a USB connection internally. In this scenario, you may also experience this symptom.

• Windows Vista Team Blog : Microphone Arrays: Digital Microphones
  Some technical details about digital microphones that can be used with Vista’s microphone array technology.
  (tags: Microphone Audio )

Some technical details about digital microphones that can be used with Vista’s microphone array technology. Keep reading →