by AirPlay and iTunes let you stream music to multiple devices simultaneously. This means you can have the same music playing on your desktop computer in sync with devices in other locations, like an iPhone or iPod touch connected to a speaker dock, an Apple TV in the living room, a media center running XBMC, or even another Mac or Windows PC elsewhere on the network, so long as that computer has an AirPlay receiver app running on it.
You will need the following to get started:
iTunes 11 or later
At least one AirPlay receiver (software or hardware) to accept the music stream
If you don’t have an AirPlay receiver like an Apple TV but still want to try this, consider downloading an app like Reflector or XBMC. Reflector has a free trial and allows for mirroring, and XBMC is free, functions as a full fledged media center, plus it works on Macs, Windows, Linux, Raspberry Pi’s, Android, and more. Either app will work for the purposes of functioning as an AirPlay receiver, and either will accept the music stream from iTunes.
How to Stream iTunes Music to Multiple AirPlay Devices
For the most interesting results, have more AirPlay receivers available.
Have the AirPlay receivers ready, meaning Apple TV is turned on, or the receiver apps like XBMC, Reflector, etc, are running on their respective devices
From the computer to stream music from, launch iTunes and start playing a song
Click the AirPlay logo alongside the volume slider to pull down the menu and click on “Multiple”
Click the AirPlay receiver device(s) you want to stream the music to
“Computer” is the local machine, keep that checked unless you don’t want the computer running iTunes to play music too. Other machines will be listed by their hardware ID or sharing names. Note that you can adjust the volume independently on each of the AirPlay receiving devices, meaning you don’t have to walk around to different rooms to adjust volume levels if you don’t want to, since the AirPlay feature of iTunes will let you control them all from a single location.
Music should play perfectly in sync everywhere, giving you a house-wide surround sound stereo system. If music is slightly off it will usually resolve itself fairly quickly, but sometimes bad wi-fi signals and connections will continue to have issues until an underlying network problem is addressed.
Streaming to a Single AirPlay Receiver
To stream all audio to a single device:
From iTunes, pull down the AirPlay menu again and click the “Single” tab
Select only the device you want to stream to
This will stop the music playing on the computer, and instead send it to only play at the receiver. Outside of iTunes, this can also be done directly from the Audio pulldown menu in OS X.
Turning Off AirPlay Music Streams
Disabling the stream and returning music to the computer running iTunes is just a matter of selecting it as sole output:
Pull down the AirPlay menu, choose “Single”, and choose only “Computer”
This is a really great feature to use for parties and social gatherings, or if you’re just doing work around the house and want to have the same music playing everywhere. I’ve even seen some creative uses where a variety of AirPlay receivers are placed around a room to create wireless surround sound for video, since the streaming works for all types of audio including movies.
This AirPlay integration appears to be new with iTunes 11, don’t be surprised if you can’t find it in earlier versions.
