Stream audio wirelessly through your home.
Your computer speakers are not the best method for listening to your music. You could burn your tracks to CD and then play through your HI-FI, but the snag is that you need access to your remote control, have to get up and change CDs and your limited to playing the tracks on the CD in your system.
Another idea would be to stream the tracks from your computer to remote speakers. You can do this through Apple iTunes, provided you have an Airport Express connected to the remote speakers. These speakers could be connected to your Hi-FI, to your TV or simply connected directly to the Airport Express. With this system, you can then choose the tracks you want to play through your speakers, without leaving your computer.
Airfoil is a software system that works in conjunction with Airport Express to enable you to listen to any audio source on your computer. This could be Windows Media Player, RealPlayer or any software that plays audio. Airfoil simply redirects the audio via your remote speakers, rather than through your computer.