The speakers provided by Airfoil can be used on Mac, Windows, and Linux; as well as on devices such as the iPhone and the iPod Touch. The audio is played in s synchronized fashion on all the devices connected to the network.
The way Airfoil works is very simple: first, you select which application you want to use as the audio source, then you select which devices will receive the Airfoil signal. This tool also includes a video player that lets you send the audio from the clip in a similar fashion.
You don't have to install the program to listen to the signal coming from Airfoil, you just need its Speaker software. Access this site to download it. Note: For Windows XP or Windows Vista.