There are multiple artists by this name; they will be listed chronologically. 1. CLAIR OBSCUR are Christophe Demarthe (vocals) and Nicolas Demarthe (guitars).Clair Obscur originated in 1981 in the new wave / cold wave / industrial scene. Their shows mixing music and visual performances were very quickly recognised, and became a reference to both the buying public and the up and coming French independant radio stations. Clair Obscur strived to nurture their musical creativity into atmospheres, rather than just dispel mere melodies.