IBM M768MR User Manual page 46

M768MR Mainboard User's Manual
The Four Speakers System
The onboard PCI Sound Pro audio system supports 2 wave
channels (front/rear) known as the 4 speaker system. If you are
running applications which use the DirectSound® 3D or A3D®
audio interface, your system can simulate realistic 3D sound
through a 4 speaker setup. Follow the steps below to install a 4-
speaker setup.
Speaker Installation
Connect the front two speakers to the Line-out jack on the sound
ports extension bracket. Connect the rear two speakers to the Line-
in/Rear jack on the sound ports extension bracket. The original
Line-in can be moved to Aux.
Speaker Position
Set up your speakers similar to the following figure to get the best
audio result.
Mixer Setup
There is a 4-speakers option in the Volume Control of the Mixer
when you are setting up the PCI Audio Application. Click on the 4
SPK icon to enable this option. This means that the output to the
rear speakers is sent through the Line-in/Rear jack. In order to
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