Macbook Pro Sound Driver Issues

I own a macbook pro, one of the new 15 inch unibody models, and since installing windows 7, i have not been able to properly use the onboard microphone (in windows) and the sound has been acting quite odd.

The osx installation cd included with my computer is supposed to install the required drivers on the windows side, and it seems to have done that, for the most part, except i could not use the microphone in a multitude of applications. The 'sound' control panel recognizes the microphone, and shows that the microphone is receiving sound. The little green level bar next to "microphone" moves when i make noise, yet no application seems to get any sound from it.

After a little research, i gathered that the sound card in these is actually a realtek hd card, and not a cirrus logic card, which is what i had drivers for. So i tracked down the realtek driver i thought i needed, uninstalled the cirrus logic driver, and installed the realtek one. However, that realtek driver did not seem to do anything, as the driver is now just listed as high definition audio device, which is the standard windows driver.

Other issues i've been having with the cirrus logic driver - once i plug headphones in, i can't get sound out of the laptop speakers again unless i restart windows. Also, if itunes is playing, the sound in all other programs in gone and doesn't come back unless i restart the program.

I guess i need to know if a) i'm correct about the realtek driver being the right one, b) the cirrus driver is actually correct and there's another solution to the microphone and other problems or c) there is no hope.

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