I’m sure you have a MP3-Player of sorts. Most players have a mini USB plug that allows you to connect it to a computer. But what If it doesn’t ? Or what IF you don’t want to use any software players ?
Windows 7 have a feature called: “Listen To Device”. What it does is let you connect your mp3-player (iPod, Zune, mobile phone, etc.) to the Line-In port (using the Jack Contact), and directly pass the music through to the Computers Speakers. Without using any software player.
Here’s how: