Use with the following products

VIA AC97 codec incorporated into VT82C686A South Bridge
VIA AC97 codec incorporated into VT82C686B South Bridge 
VIA AC97 codecs incorporated into VT8233, VT8233A, VT8233C, VT8235 and VT8237 South Bridges 
VIA Six-TRAC (VT1616 Codec)
VIA Vinyl Eight-TRAC (VT1617 Codec)
VIA AC97 codec incorporated into VT8231 South Bridge
VIA VT1612A audio codec

Please read release notes

http://downloads.viaarena.com/drivers/audio/570a/ReadMe.txt