Asus M4A77T - Manual (Page 35)

6. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.
Ensure that the audio device of Sound playback is VIA High Definition Audio (the name
may be different based on the OS). Go to Start > Control Panel > Sounds and Audio
Devices > Sound Playback to configure the setting.
The S/PDIF module is purchased separately.
• We recommend that you connect a high-definition front panel audio module to this
connector to avail of the motherboard high-definition audio capability.
• If you want to connect a high definition front panel audio module to this connector, set
the Front Panel Select item in the BIOS to [HD Audio]. See section 2.4.4 Onboard
Devices Configuration for details.
• The front panel audio I/O module is purchased separately.
7. Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that supports
either High Definition Audio or AC`97 audio standard. Connect one end of the front
panel audio I/O module cable to this connector.
ASUS M4A77T 1-25