Things You'll Need
Instructions
Connect your Xbox 360 and computer to your home network. It does not matter if they are connected via a wired or wireless connection, but they must be connected to the same network.
Open Windows Media Player and import all of your music files into the media player's library.
Select "Media Sharing" from the "Library" tab at the top of the window.
Check the "Share My Media" check box to enable media sharing.
In the list of available devices to share, select your Xbox 360 and click "Allow."
Turn on your Xbox and go to the "Media" section and select "Music."
Select your computer as the source and you will be able to play all of the music files currently in your Windows Media Player library.