Shifting between speaker-rattling blasts of lush, goth-tinged techno and the propulsive throb of synth-pop at its darkest, Austra fills their third album with sharply politicized club bangers, along with ghostly ballads about the power of resistance in a tumultuous era. Whether the band is pounding out a menacing floor-filler like “Utopia” or reveling in keyboard-driven eeriness on “Freepower,” frontwoman Katie Stelmanis often swaps her trademark vocal fireworks for a hypnotic murmur, but her soaring, intense choruses will still take your breath away.