With its façade of scales of light, frosted glass, steel, and wood, the Métaphone® is both a concert hall and a musical instrument. On the site of the 9-9bis in Oignies, this structure which is unique in the world, is entirely dedicated to sound. There are rehearsal and recording studios, a musical resource centre, a dance studio, an auditorium, as well as a heritage route which echoes the site’s highly symbolic history. It is in fact very close to where the Pas-de-Calais’ first reserve of coal was discovered in 1842. It is also where the last lump of coal was mined in 1990.