“There are three schools of symphonic extreme metal, generally speaking. You have neoclassical material, which aims to recreate the lush and delicate intricacies of classical music of a bygone era reinvigorated by a metallic influence. Then, there’s the cinematic blockbuster approach, where choirs and orchestral hits function as a source of grandiose drama and explosive scale. Finally, you have the oddball works of mad scientists who use orchestration as a tool primarily to create strange and uncomfortable music. Vortex fall under the second category.” A night at the Vortex.