Open your volume control and set your speaker if internal to analog stereo (not duplex). Set your headphones to analog stereo duplex. All headphone and speaker jacks out are duplex, but single internal speakers are not. You may have to reset your headphones each time you use them. As far as I know this card is supported. I have one on an old HP and it works fine, but other than that it's all intel. Sony may be different.
TC