After a long day, I'm trying out repent, the new album from gnashing teeth.
I'm not very good on sub-genre labels, but I can see where the black and death metal tags come in. (More research is needed into the various flavours of grind / grindcore.)
But the Bandcamp reviewer who calls it "a sonic assault in every way possible" is not wrong.
repent, by gnashing teeth
7 track album