Speaker settings in Windows Media Player
Use the Speaker Properties dialog box in Windows Media Player to select the audio device you want to use and change speaker settings.
Click the Start
, click All Programs
, and then click Windows Media Player
If the Player is currently open and you’re in Now Playing mode, click the Switch to Library
in the upper-right corner of the Player.
In the Player Library, click Organize, and then click Options.
Click the Devices tab, click Speakers, and then click Properties.
Select the options you want, and then click OK.