STEP 3:
After plugging in 4-channel speakers to the rear speaker jacks, a small window will pop up and ask you what type of equipment is connected. Choose a device depending on the type of speaker connected (4-channel audio consists of Front Speaker Out (Line Out) and Rear Speaker Out) and then click OK. The 4-channel audio setup is completed.
6 Channel Audio Setup
STEP 1 :
After installation of the audio driver, you should find an Audio Manager 
icon in your system tray (you can also find the icon in Control Panel). Double- click the icon to open the Audio Control Panel.
STEP 2:
In the Audio Control Panel, click the Audio I/O tab. In the upper left list, click 6CH Speaker.
STEP 3:
After plugging in 6-channel speakers to the rear speaker jacks, a small window will pop up and ask you what type of equipment is connected. Choose a device depending on the type of speaker connected (6-channel audio consists of Front Speaker Out (Line Out), Rear Speaker Out, and Center/Subwoofer Speaker Out) then click OK. The 6-channel audio setup is completed.
