“What does the future sound like?” ask Orchestral Manoeuvres in the Dark in 2013's “The Future Will Be Silent,” a techno-inflected post-comeback track. They should know. Their sound design has always been unfailingly adventurous: Check the avant-garde drones of 1981's “Sealand” and the eerie, detuning synths of 1980's “2nd Thought.” And 2010's “If You Want It” renders classic synth-pop as hi-def as a Hollywood blockbuster.