In the 1970s he became involved with creating the soundtracks of horror films, forging a successful alliance with director Lucio Fulci. He also became interested in the experimental music of the time and befriended musicians of the band Goblin among others. This led to a few of his soundtracks crossing into RPI territory, blending symphonic prog, dramatic choir vocals, keyboard experimentation, and dark-sounding rock. Some of this work could be described as a mix of Goblin with a more refined, subtler Jacula.