Hello Parkerker;
I'm guessing you've already run Windows 7 update?
And that it didn't find a matching driver in the Win7 driver repository?
Update a driver for hardware that isn't working properly
A manual method for updating drivers where you force Win7 to look for drivers.
If none of those options work you're next step is to ID the audio device. Device Manager should give you enough details to determine manufacturer and model number. With that you can check the manufacturer website to see if it has any drivers for that hardware.
And finally, you might find references to other MFGRs using the same audio hardware that DID take the trouble to write Win7 device driver software for it's customers.