In 1973 he entered the Conservatory to study music theory, percussion and music history. Influenced by the punk movement, he created in 1974 the band Hubble Bubble, sharing his time between study at the Conservatory, rehearsals and concerts with the band, and work as stage manager at the Theatre des Galeries. In 1978 Hubble Bubble released their first of two albums, also titled Hubble Bubble. Jouret is credited as the Songwriter, singer and Drummer under the name "Roger Junior". Unfortunately, the group's bass player was killed in an accident returning from a rehearsal, and the group disbanded.