A2D2 Stream will automatically find AirPlay compatible speakers and receivers on the same network it is attached to.

It's really easy, just tap the play icon on the speaker you'd like to listen on in the A2D2 App (visit http://a2d2.local) and A2D2 Stream will do the rest.

If the device doesn't start playing, it'll be because some networks can link AirPlay to A2D2 Stream. In that case, go to A2D2's app at http://a2d2.local and choose the 'play on this device' option via an Apple device. You'll hear audio through your apple device and Apple's built-in AirPlay integration will appear as an AirPlay icon. Tap that, and choose your AirPlay speaker that way.

AirPlay supports 16bit stereo audio at 44100Hz.