Its mission is to speak to 'have-nots' and to promote the local, national and international independent scene.
In spite of its emphasis on rock'n'roll, Radio Dio broadcasts a great diversity of current musical styles, including reggae, electro, and some blues and metal.
[clarification needed] Dio broadcasts on the Internet and on FM frequency 89.5 MHz, in Saint-Etienne and its near surroundings.
Having previously been a pirate station, Radio Dio was officially created in 1981, as part of the liberalization of the FM band.
It is also member of the collective d'associations ligériennes, the Slug, which manages the SMAC, Salle of the Current music of St Etienne, the Wire, which was inaugurated at the end of January 2008.