There is not one, nor two, but at least three albums of Tool songs transposed into lullabies. Songs by metal bands like Iron Maiden, Slayer, and (deceptively) Babymetal have been decelerated and marimbafied for the ears of infants. Icons like Beyoncé, David Bowie, and Jennifer Lopez glockenspieled; pop-punk bands like Blink-182, Green Day, and Rancid gently woodblocked; grunge bands like Stone Temple Pilots, Soundgarden, and Smashing Pumpkins xylophoned to put the 0-to-9-months crowd to sleep.
Beneath the hit-filled playlists of Spotify and YouTube is an entire shadow world of babified rock, pop, hip-hop, EDM, country -- really, most any genre of music -- swimming concurrently to adult-person music, most recently broaching the surface of public consciousness during this year's Super Bowl. Of the many befuddling commercials that aired during this year's game, there was one especially puzzling T-Mobile ad promoting gender and racial equality, in which a camera slowly hovers over a rainbow of baby faces as the narrator whispers a few apolitical lines about how everyone deserves a fair shot in life. The masterpiece is set to a nursery-friendly cover of Nirvana's "All Apologies," In Utero's A-side companion to "Rape Me," and wildly considered an augury of Kurt Cobain's suicide.