Re: DRIVER NEEDED: Intel Analog Devices AD1981A @ Intel 82801DB ICH4 - AC'97 Audio Controller [A-1] PCI (Windows XP Professional) [PCI / ISA]
Analog Devices AD1981 is a sound chip but Intel 82801DB ICH4 is not. Lots of motherboard and pc makers used the Analog Devices AD1981 sound chip in building their boards.... each requiring a unique driver. Without you saying what computer and/or motherboard it came installed in, there's not much way we can help.
Your in the same boat as this member who also failed to say what it came installed in:
And this member did identify his computer/motherboard but whether the same driver will work on your machine is undetermined: