Found one solution that works after working through a bunch that didn't.
The audio drivers that come with the latest boot camp don't work to produce sound even though Windows is reporting that the device High Definition Audio is working.
The task is to update the device driver using the driver from Cirrus Logic which can be found at
http://www.stuffedcow.net/macbook_audio. Select "WinVista" version on this page or use this link to download the zip that contains the drivers at http://www.stuffedcow.net/files/CS4207_WinVista_Win7_32-64-bit_6-6001-1-30.zip.
First unzip the drivers to a file folder of your choice that you will need to remember as you will need to point to it later, e.g. c:\users\yourname\Cirrus_Logic
Next find the audio device in device manager. Can use Search Settings "device", select "update device drivers" or "device manager" and find "Sound, Video, and Game Controllers". Under this item, you should see a High Definition Audio device that is working properly., Right Click on it and select "Update Driver Software", then "Browse My Computer for driver software", then navigate to or paste the folder path into the location window. Click Next, and it will start looking for drivers in that folder/path.
It should find the drivers and complete the installation and when it is done your sound device should now be named "Cirrus Logic". Be patient at this step, it can take a few minutes.
Must reboot computer at this point and then sound through speakers or audio jack should be working!
Good Luck,
Darryl
