Danish producer and film composer Mads Heldtberg, once a guitarist of frenetic Danish crypto-metal outfit Düreforsög, who opened Orange Stage at Roskilde Festival back in 1997 and signed to Faith No More-bass player Billy Gould’s label Koolarrow in 2000, returns with an instrumental album called “City Of Quartz” that was four years in the making. “The title derives from the Mike Davis book on ...