Asus Crosshair II Formula - Manual (Page 134)

5-12 Chapter 5: Software support
5.3.3 AI Audio 2 (SoundMAX ® High Definition Audio utility)
The ADI AD1988 High Definition Audio COD�C provides 8�channel audio
capability through the SoundMAX ® audio utility with AudioESP™ software to
deliver the ultimate audio experience on your PC. The software implements high
quality audio synthesis/rendering, 3D sound positioning, and advanced voice-input
technologies.
Follow the installation wizard to install the ADI AD1988 Audio Driver from the
support DVD that comes with the motherboard package to activate the
SoundMAX ® audio utility.
If the SoundMAX ® audio utility is correctly installed,
you will find the SoundMAX ® / SoundMAX ®
BlackHawk icon on the taskbar.
You must use 4-channel, 6-channel or 8-channel speakers for this setup.