From Spin’s slideshow of cassettes (“bootlegs,...

From Spin’sslideshow of cassettes (“bootlegs, official releases, and homemade wonders from back in the day”):

And finally, a bona fide copy of Nirvana’s legendary “Smart Studios” demo — recorded with Butch Vig in April of 1990 — slipped to us by an A&R guy later that year (it was such a hot item that the exec actually tried to obscure the band’s name with Wite-Out). The tape included seven then-new songs along with three fromBleach. Five of those new songs would be re-recorded forNevermind(inc...