I mentioned a little while back in a couple posts that I was developing a wireless audio library for Arduino, and it has finally come to fruition. Many people are familiar with my WAV Audio library for playing audio from SD cards using Arduino, and I've developed another related library for wireless audio streaming.
The new library relies on my optimized RF24 library fork which enhances the speed and reliability of NRF24L01 radio modules, and is required for proper use of the RF24Audio library. The integration with the core radio library allows additional features like streaming wireless audio directly to a PC for analysis and/or recording of the audio.
Beginner Arduino users can create simple radios or intercom devices at very low cost, simply by connecting a microphone, speaker and radio module, and running one of the example sketches. The audio can be broadcast in realtime to one or more groups of radios running the RF24Audio library.
The library also integrates directly with the TMRpcm audio library, so users can also broadcast audio from SD card wirelessly in the case of such things like halloween displays etc, where everything can be timed and broadcast wirelessly from a single Arduino.
Documentation/Downloads can be found here: http://tmrh20.github.io/RF24Audio/
*Edit to add youtube demonstration : https://www.youtube.com/watch?v=eTFsQIXMXA0