Airfoil lets you send any audio to remote speakers attached to yourAirPort Express. AirPort Express - It's not just for iTunes anymore. With Airfoil, you can send audio from any application to your AirPortExpress in just three easy steps. Step 1) Select the application whose audio you want to transmit, in theAudio Source area. Step 2) Select the desired AirPort Express device from the RemoteSpeakers list. Step 3) Click Transmit. That's it! Once you do this, any audio from the audio source will play out throughyour remote speakers. Use Airfoil to play audio from RealPlayer, WindowsMedia Player, Safari, and almost any other application right throughyour AirPort Express. Give your audio wings, with Airfoil.