Helladdict’s new single, “Sudden Death,” doesn’t feel like a tribute; it feels like an exhumation. Here are six men from Santiago, all seasoned enough to know that pure fury is a young person’s game, offering instead the far more corrosive anger of experience. They resurrect the chassis of 80s thrash, all bone-raw intensity and punishing tempo, but the engine is modern, built with the...

Sound Liberation’s “Elegy” isn’t so much an album as it is an unbolting of several sonic cages, letting the inhabitants mingle, argue, and eventually, find a strange, compelling harmony. Gene Pritsker and his rotating ensemble are, as ever, on a crusade against the "segregation of sound vibration," and here, their weapon of choice is grief, remembrance, and an absolutely defiant refusal to sit still...