MSI RS482M2-IL/L - Manual (Page 86)

A-7
Using Audio Function
Speaker Configuration
In this tab, you can easily configure your multi-channel audio function and
speakers.
First select a desired multi-channel operation from No. of Speakers.
a. Headphone for the common headphone
b. 2-Channel Mode for Stereo-Speaker Output
c. 4-Channel Mode for 4-Speaker Output
d. 6-Channel Mode for 5.1-Speaker Output
And then click OK to apply the configuration.