GIGABYTE GA-P31-ES3G - Manual (Page 71)

Appendix - 71 -
B. Configuring Sound Effect:
You may configure an audio environment on the Sound Effect tab.
C. Activating an AC'97 Front Panel Audio Module:
If your chassis provides an AC'97 front panel audio
module, to activate the AC'97 functionality, click the
tool icon on the Audio I/O tab. On the Connector
Settings box, select the Disable front panel jack
detection check box. Click OK to complete.
D. Muting the Back Panel Audio (For HD Audio Only):
Click the tool icon on the Audio I/O tab. On the
Connector Settings box, select the Mute rear
panel output when front headphone plugged
in check box. Click OK to complete.