Step 1: On your iDevice open a stream
Step 2: Now double tap on home button which will bring up the App Switcher tray on your screen.
Step 3: Swipe App Switcher tray from left to right to reveal the media player control, including an AirPlay icon
Step 4: Now tap on AirPlay icon and select the Apple TV to which you want to stream the audio.
Step 5: Make sure you don’t turn on Mirroring if the option is present because it is unnecessary.
Step 6: Your audio should start playing on your TV or home theater system.
iPhone / iTouch