It’s been more than forty years since Kool Herc starting throwing parties in the South Bronx, and so you could forgive the casual fan for thinking that nearly every permutation of hip-hop has already been explored. But KEITH, the new album from the iconic rapper Kool Keith and the master producer Psycho Les (due out July 12 on Mello Music Group) argues just the opposite: that what’s absurdly funny can also be sinister and strange, that the form can still be broken in new and radical ways.