This app uses your phone to convert sound into light. It converts pitch into color and loudness into brightness.
The app also contains cryptic inscrutable controls for adjusting the input sound signal, the transform, and the output light signal.
It is useful for watching music.
Free. No ads.
The app uses the emirac lifx library to control your LIFX bulbs on your local network -- no internet cloud required.
The Apache Commons Mathematics Library
The Emirac LIFX Library