Launched in December 2015, Resonance Extra is a 24/7 digital broadcasting platform dedicated to global music, sound art and radio art based at Resonance, London's community radio station for the arts. Resonance Extra broadcasts online via its website, TuneIn and Radioplayer and on DAB+ Digital Radio to a footprint of around 4.1 million people in Brighton & Hove, central Bristol, Cambridge, Greater London and Norwich.