Sweden’s latest indie buzz band, jj, veer toward the electronica-tinged pop sounds of their countrypeople—think Robyn, The Knife, Air France—on sophomore record jj n° 3, proving there’s no need to ditch a profitable formula. But jj’s elusive, publicity-eschewing band members Joakim Benon and Elin Kastlander, know the secret to a steady output of bright, shiny records is not-so-happy underpinnings, bringing a sense of humanity to what, on the surface, can come across as lullaby music.