Black Keys singer-guitarist Dan Auerbach opens his first solo outing with an acoustic country blues (“Trouble Weighs a Ton”) that sounds utterly authentic but signifies mainly as a museum-quality reproduction. Fortunately, the rest of Keep It Hid hews more closely to the Keys’ scuzz-encrusted, blunt-instrument assault — the tremolo-soaked “Heartbroken, in Disrepair” throbs like ZZ Top on a lo-fi bender, and the lecherously lumbering “When I Left the Room” is a slow-burner of barn-burning proportions.
