With Airfoil, you can now send any audio right to your AirPort Express, Apple TV, third-party AirPlay devices, as well as other PCs and Macs! It even works with iOS devices like the iPhone, iPod Touch, and iPad.
Send audio from Spotify, Rdio, Winamp, and other media players all around your house. Send web-based audio from Pandora and more as well. Send audio from almost any application out!