In iOS 6 beta 3, however, you can send audio from the Apple TV to an AirPlay–
AirPlay is Apple's Wi-Fi audio streaming tech, and the second-generation is now. the receiver is an Apple TV or third-party speaker, such as a Sonos device.
The Apple TV is a great device for audio and video casting, but it's expensive.. The Anewish Wireless WiFi Audio Receiver is like a Chromecast Audio on .