Now that they’re more than a year removed from their Elemental records, Demdike Stare are up to their old antics again, releasing incredibly rare slabs of vinyl that mine the blurred line between experimental and electronic music. Now available over at Boomkat–and if you’re lucky, your friendly neighborhood record store–the Test Pressing series is presented in hand-stamped sleeves with two extended songs engulfing the grooves of each volume. Check out the first two installments below; we’re partial to the freshly pressed “Primitive Equations” personally, what with its irresistible Photek nods and all…