I am going to assume that you are using integrated sound, meaning on board chip set.
So what kind of drivers have you tried?
You can download and run CPU-Z
It will display;
Name and number.
Core stepping and process.
Internal and external clocks, clock multiplier.
Supported instructions sets.
Vendor, model and revision.
BIOS model and date.
Chip set (northbridge and southbridge) and sensor.
Frequency and timings.
Module(s) specification using SPD (Serial Presence Detect) : vendor, serial number, timings table.
Windows and DirectX version.
Then I would go to the Mainboard manufacturers website and download their Audio Drivers.
If that doesn't work try southbridge chipset drivers.