Airfoil on Mac gives you a chance to send any sound from your Mac to any Airplay source – speakers, Airports, AppleTVs, and so on. It offers granular, per-application control that the framework choice woefully needs, and gives you a chance to send sound out to various arrangements of speakers.
Airfoil on Mac
Rebel Amoeba, designers of Airfoil, incorporate a free duplicate of Airfoil Speakers with every buy, which gives you a chance to get Airplay sound on your Mac (or iPhone/Android gadget).
One fun approach to utilize both of these is to set up Airfoil and Airfoil Speakers on your Mac, then Airplay your iPhone sound to your Mac – along these lines you can send one telephone’s sound out over different arrangements of Airplay speakers, something that is generally difficult to do.