How to AirPlay only audio from your Mac

Sending audio from your Mac to a nearby AirPlay device can be a useful tool for presentations, as well as another way to listen to music. Mirroring AirPlay was first introduced in Mac with the release of OS X Mountain Lion, 2012. The feature makes it possible to take everything on your Mac screen appearance to a nearby TV connected to an Apple TV . But what if you want to share audio without someone else watching your screen, or you simply want to use a service AirPlay speaker to listen to music? You can use AirPlay on your Mac to only send the dings, beeps and any other sound to AirPlay device. This feature comes in especially handy when listening to the radio station Beats 1 of Apple Music, because Apple AirPlay off in iTunes when you start the flow channel (for some reason I still have to figure out). To do this you must have a Mac that was built in 2011 or later, running OS X Mountain Lion or later. Remember, you will need an Apple TV or AirPlay compatible speaker conne...