“The clouds may have parted, but it’s not all sunshine for siblings Piper and Skylar Kaplan. In April, the L.A. synth pop duo released “Tell Me,” the first single from their upcoming sophomore LP, *Autodrama—*it emerged from the muggy atmospherics of their earlier work, befitting a recent Madonna cover. The next single from Autodrama, “Peccavi,” is no less melodic or yearning, but it’s more melanch”