Effective Living > Technology > Apple
Problem Summary. The Airport Express wireless base station is capable of playing music from iTunes on an Apple or Windows computer. Unfortunately, the software available from Apple does not offer the ability to play system audio or any other audio through the Airport Express. For example, if you are watching a DVD using the Apple DVD player, there is no option to have the audio play through the Airport Express.
Problem Solution. AudioFoil is a program from Rogue Amoeba makes it possible to have any audio from an Apple or Windows computer ported to the Airport Express.