Ever since Kurt Cobain's death in 1994, Nirvana fans have hypothesized about the music he would have made had he lived. But other than "You Know You're Right," the scabrous, throat-shredding meditation on confusion that Nirvana recorded a few months before his suicide, and a few comments he told confidants about potentially collaborating with R.E.M.'s Michael Stipe or going completely solo, he mainly left behind question marks. Now an organization has created a "new" Nirvana song using artificial-intelligence software to approximate the singer-guitarist's songwriting. The guitar riffs vary from quiet, "Come as You Are"–style plucking to raging, Bleach fury à la "Scoff." And lyrics like, "The sun shines on you but I don't know how," and a surprisingly anthemic chorus, "I don't care/I feel as one, drowned in the sun," bear evocative, Cobain-esque qualities.