MSI 785GTM-E45 - Manual (Page 71)

A-9
MS-7549
When you are playng the first audo source (for example: use Wndows Meda Player
to play DVD/VCD), the output wll be played from the rear panel, whch s the default
settng.
Then you must to select the Realtek HD Audo 2nd output from the scroll lst first, and
use a dfferent program to play the second audo source (for example: use Wnamp to
play MP3 files). You wll find that the second audo source (MP3 musc) wll come out
from the Lne-Out audo jack of Front Panel.