Rosalía was an unusual hitmaker. Now she wants to be something else entirely. With her fierce, beat-driven album “MOTOMAMI” (2022), the musician “took her place among the Spanish-language artists who have lately transformed popular music,” Kelefa Sanneh writes. But these days she has something different in mind. “Lux,” her intense and expansive new album, turns out to be a sharp swerve away from the logic of the pop economy, in which songs compete to provide the most pleasure to the most people. “ ‘Lux’ sounds less like a streaming playlist and more like a cult film, or perhaps an art installation,” Sanneh writes. “Having conquered the pop world with ease, Rosalía is now embracing difficulty.” There is a story to “Lux,” or maybe there are a few different stories. The lyrics hint at love, betrayal (one song includes the phrase “un terrorista emocional”), revenge, and acceptance. It’s an album that’s not designed to be ubiquitous, or to slip smoothly into our lives and playli...