4Select Make front and rear output devices playback two different audio streams simultaneously.
5Place a check in the Output Mic In/Line In to front panel check box, and then click OK.
Or
Place a check in the Output Mic In/Line In to rear panel check box, and then click OK.
Configuring audio for Windows Media Center
After you have installed, connected, and configured the speakers, follow these steps to configure multichannel audio output for Windows Media Center:
1Click the Windows Start Button 
on the taskbar.
2Click Windows Media Center.
3Under Tasks, click settings, General, and then click Windows Media Center Setup.
4Click Set Up Your Speakers. The Welcome to Speaker Setup window opens.
5Click Next.
6Choose the speaker connection type, and then click Next.
7Select the number of speakers, and then click Next.
8Click Test to test the speakers.
9Click Finish.
Selecting recording devices
(Type 6 connectors only)
To select a sound recording device:
1Click the Windows Start Button 
on the taskbar.
2Click Control Panel.
3Click Sounds and Audio Devices (or Sounds, Speech and Audio Devices). The Sounds and Audio Devices window opens.
4Click the Audio tab.
5Under Sound Recording, select a recording device, such as Realtek HD Front Pink Jack.
6Click OK.
7Close the window.
Configuring Speaker and Sound Options 67