Sometimes requests go un-answered when:
1. The question may be unclear or we cannot determine what it is that you are asking for.
2: The hardware in question is unknown or inadequately described.
3. The question seems to request an answer for something that cannot be explained online adequately.
4. The Experts that are online simply don't have the resources to answer your question fully until additional information is provided.
Please feel free to re-word your question or add additional information you might feel helpful for the Experts to assist you. A start would be a complete/valid motherboard and/or computer brand and model and a physical description of the hardware device you need a driver for.
As a last resort, open Device Manager, find and double-click the sound device (it may be listed under "Unknown Devices" if no driver has been installed), click the Details tab, select "hardware id" and give me the hardware id string that begins with "PCI\VEN", (1st./top line of text only).