This driver is for integrated sound on motherboard solutions using the Yamaha OPL3-SAx chip (YMF7xx). It is pretty hard to find buried in Yamaha's site so here it is. THIS IS DIRECT X CERTIFIED, so it should solve a lot of problems people have with new applications. I do not know if it is WHQL Certified. If you have a Yamaha Sound Chip, and have problems with DirectX Apps, try this update first. JUST RUN SETUP & GO!