Here and throughout Detourn, frontman Rekti Yoewono croons with the angst of Flower Travellin’ Band’s Joe Yamanaka and the soulful howls of a young Robert Plant. It sounds as though guitarist Farri Icksan somehow procured Tony Iommi’s white Gibson SG and the distorted Orange amplifiers from Black Sabbath’s “Paranoid” video. The opening cut, “Detourn,” explodes with thundering rhythms hammering down over heavy riffs. Detourn resonates with the raw, proto-metal punch of the bands that filled the smaller ballrooms of San Francisco in the late '60s. With Detourn, The Super Insurgent Group of Intemperance Talent has outdone itself.