What exactly are you describing with "ms7222"? That's not a VIA chip number but sounds like a
MSI model
PM8PM-V motherboard. If you're needing a driver for that motherboard, please visit this MSI webpage:
http://www.msi.com/product/mb/PM8PM-V.html
....then click on the "Download" link, then click on "driver". The
"VIA Chipset 4in1 Drivers" most likely contains the Audio driver for this mb.