RjDj

RjDj (Reality Jockey Ltd.) was a startup founded in late 2008 by last.fm co-founder Michael Breidenbruecker. The company was based in London and was run by a small team of four employees. Its mission was to create sonic experiences specifically designed for the latest generation of personal music players. RjDj produced and distributed a network of mobile applications and sold additional musical content within this network.

RjDj developed a new genre of music that it called Reactive music, a non-linear form of music that was able to react to the listener and his environment in real-time. Reactive music is closely connected to generative music, interactive music, and augmented reality. Similar to music in video-games, that is changed by specific events happening in the game, reactive music is affected by events occurring in the real life of the listener. Reactive music adapts to a listener and his environment by using built in sensors (e.g. camera, microphone, accelerometer, touch-screen and GPS) in mobile media players. The main difference to generative music is that listeners are part of the creative process, co-creating the music with the composer. Reactive music is also able to augment and manipulate the listeners real-world auditory environment.