Apple’s Boot Camp Assist 1.1.2 b includes SigmaTel audio driver for MacBook. However, when I first installed it, the microphone was not working.

I first thought the microphone driver is not compatible with Vista. Later, I found that it’s not a compatibility problem. The microphone is just not enabled by default. Here is how you enable it.

1. Open up Control Panel. Go to Ease of Access.

   

2. Click on Set up a microphone.

   

3. Follow the wizard to set up your microphone as a desktop microphone.