S.D.I. / LOUDNESS Cover Feb 21, 2016 A Lesson In Loudness, Cover Heavy Metal, Cover Loudness, Cover Metal, Cover S.D.I., The Soldier's Just Came Back - Live Best, Loudnessdness0. Like 0 Thanks! You've already liked this « LOUDNESS – S.D.I. Guitar cover. » S.D.I. (Loudness Cover)