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Built-in microphone does not work

APPLIES TO:
  • Parallels Desktop 10 for Mac Standard Edition
  • Parallels Desktop 9 for Mac Standard Edition

Symptoms

  • Unable to use microphone in Skype for Business (ex. Microsoft Office Lync)
  • Loud echo while using microphone with Skype for Business (ex. Microsoft Office Lync)
  • Internal microphone does not work

Cause

Sound emulation causes the delays and Sound canceling algorithm fails.

Resolution

Try to use USB Headphones. Pass them in directly in virtual machine using Parallels Desktop menu bar:

Devices > External Devices > check Headphones name

Also, you ma try to perform this workaround:

  1. Start virtual machine.

NOTE: Please take a snapshot of your virtual machine (in Parallels Desktop menu bar go to Actions > Take snapshot) before you proceed with the instruction below to be able to revert all the changes.

  1. Press "cmd"+"R" key combination, type 'regedit' (without quotes) and Return/Enter to run Registry Editor.

  2. Locate and highlight HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e96c-e325-11ce-bfc1-08002be10318} key and look for UpperFilters value in the right box.

  3. Highlight UpperFilters value and delete it:

  4. Expand HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e96c-e325-11ce-bfc1-08002be10318} key and check every subkey for 'KS' value. If you find it, delete it.

  5. Re-install Parallels Tools (in Parallels Desktop menu bar: Actions > Reinstall Parallels Tools) and reboot your virtual machine.

  6. After that please do the following:

    • Start menu > in the search box type "Control Panel" > in View by choose "Small icons" > Sound
    • Browse to "Communications" tab
    • Select "Do Nothing"
    • Press "OK"

    • In the Recording tab -> Right-click Microphone -> Properties -> switch to Volume tab and set it to 100%

    • In the application you use also set microphone volume to the maximum.



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