Matthieu has dicovered the Hardcore as a musical revelation, during his first raves in may 1992. By passion for this electronic music extrem style, he decides to fonded with friend in 1993 the Hardcore Sound-system "Psychiatrik", which will organize a lot of parties until 1996, in all the french free parties, technivals an other tribes trips. This artist begins his activity with the name of Dj Tieum.