As Spectacular Diagnostics, Chicago producer Robert Krums specializes in hip-hop tracks that seem to circle the planet in low orbit, collecting cosmic dust that mixes with flecks of grit from our world. On his new album, Natural Mechanics (Group Bracil), he blends samples like he’s devising floral arrangements for a royal wedding—the glassy keyboard melody that strolls through “Molasses” picks up new colors as he throws on sparse, dubby percussion and a brief clip of springy sitar.…Read More