sentence: personnel ; dio ronnie james dio -- lead vocals vivian campbell -- guitar jimmy bain -- bass claude schnell - keyboards vinny appice -- drums , percussion ; production recorded at caribou ranch , colorado , usa produced by ronnie james dio engineered by angelo arcuri assistant engineering by rich markowitz mixed on westlake audio bbsm6 monitors originally mastered by george marino at sterling sound , new york , usa remaster by andy pearce ( 2012 universal deluxe edition ) remastered by steve hoffman ( 2012 audio fidelity 24k edition ) illustration by barry jackson charts ; album ; singles certifications it was certified gold ( 500,000 units sold ) by the riaa on september 12 , 1984 , and was the first dio album to be certified platinum , achieving the feat on february 3 , 1987 .