SoundMax audio on Maximus Formula

I have Maximus Formula and I'm going to install win 8 but I can't find SoundMax audio driver for Win 8.

anyone have same problem or have solution please post here

Thanks

I use Win 8 on Asus Maximus Formula.
This driver AD1988AB_Audio_V6585_XpVistaWin7 works on win 8.
Install in Win 7 Compatibility Mode.
Download from Asus:
ASUSTeK Computer Inc. -Support- Drivers and Download Maximus Formula