Mathias divides his time between Marseille and the countryside, where he's been composing music and writing lyrics for over 20 years. Under the pseudonym Usthiax, he has recorded four albums and collaborated with numerous artists, CharlElie Couture, Rodolphe Burger, Dick Annegarn and visual artists and videographers such as Dimitri Lamouret, Julien Toty (Vertu) and Dominique Gros. Mathias is passionate about modernity and particularly the fusion of electronic and acoustic sounds; a skilled and versatile guitarist with a unique edge.