IEI Integration NANO-9452 v4.02 - Manual (Page 220)

NANO-9452 EPIC Motherboard
Page 202
o Channel mode for 5.1 speaker output
o Synchronize the phone jack switch with speakers settings
 Speaker Test - Each speaker connected to the system is tested individually
to see if the 4-channel or 6-channel audio operates properly.
 S/PDIF-In & S/PDIF-Out - S/PDIF is used to transmit digital and analog audio
signals with either a 48 or 44.1kHz sample rate.
 HRTF Demo - Adjust HRTF (Head Related Transfer Functions) 3D positional
audio before running 3D applications.
 Microphone Effect - Microphone noise suppression is enabled in this menu.
 General - General information about the installed AC’97 audio configuration
utility is listed here.