It allows you to send any audio to AirPort Express units, Apple TVs, and even other Macs and PCs, all in sync! It's your audio - everywhere. With this app, you can take audio from any application and send it to your AirPort Express units, as well as Apple TVs and even other Macs and PCs running Airfoil Speakers!

Transmit audio from RealPlayer, Windows Media Player, QuickTime Player, and other media players. Send audio from web-based applications like Pandora, Last.FM, and other to the AirPort Express. Around your house, you can even stream audio from audio devices like RadioSHARK, XM, and Sirius radios.

Technical Details and System Requirements
Supported Operation System: OS X 10.9 or later, 64-bit processor