The last two years changed music for everyone. They might have changed HEALTH for the better.    Three years after VOL.4 :: SLAVES OF FEAR, the L.A. trio’s ferocious entry into the world of heavy music, HEALTH return with the second half of their DISCO4 series. On the first installment in 2020, they swapped remixes for original collaborations with Perturbator, 100 Gecs and JPEGMAFIA.    A whole lot went to hell in the meantime, forcing the band to re-invent how they wrote music together. For DISCO4 :: PART II they cut it fast and mean, recruiting both legends and nascent contenders of heavy music and its many peripheral genres.    The centerpiece of DISCO4 :: Part II is the Nine Inch Nails collaboration “ISN’T EVERYONE,” which re-unites HEALTH with their early-career arena tourmates. The mesh between Trent Reznor’s growls and Jake Duzsik’s gossamer melodies—all over a gigantic synth barrage—feels like a new moment in industrial music.    On “COLD BLOOD,” their latest single with metal titans Lamb of God, HEALTH show they can devote themselves to a genre and detonate it all in the same track. Its blistering heaviness juxtaposed against album cuts like the raucous “GNOSTIC FLESH/MORTAL HELL” (with noise-rap banshee Backxwash and the virtuosically scabrous trio Ho99o9) or the contemplative “STILL BREATHING” (co-piloted with teenage post-punk experimentalist Ekkstacy), demonstrates the breadth of HEALTH's sonic palette and ability to incorporate what heavy music looks like today and going forward.    From their twitchy 2007 debut, through the groundbreaking 2012 score for Rockstar Games’ Max Payne 3 and 2015’s DEATH MAGIC, multi-instrumentalists/producers Jacob Duzsik and John Famiglietti, and drummer Benjamin Miller, snuck beauty and rigor into blinding noise. They draped moody violence over trap beats and warehouse rave sounds alike.     HEALTH are not only making the heaviest, most genre-obliterating music of their career. They’re documenting just how insane it feels to be alive right now.