“The Idler Wheel . . . ,” Fiona Apple’s first album in seven years, is pop music as self-flagellation. Sometimes you don’t want to hear what Apple will say next, but you also can’t tune it out. Through 10 uneasy songs mostly set to dirge-like piano melodies and inscrutable percussion, Apple exorcises the demons that constantly keep her on edge. “Every single night’s a fight with my brain,” she says on the opening “Every Single Night,” later concluding, “I just want to feel everything.”
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