Quickly choose between audio destination

today i notice that it is quite easy to switch the audio destination in OS X. With a normal left mouse click on the sound menu item you will have the option to set the volume, like in the following screenshot.
normal sound options
If if you hold down the alt key on the Mac keyboard while you click on the sound menu item, you can switch between the audio output devices and audio input devices. You will the a list like the one below. The sound menu isn’t the only menu item that offers some “hidden” features. It is worth to try out some more.
more sound options