''You Know You're Right''

With its murmur-to-a-scream structure, Nirvana’s long-suppressed recording ”You Know You’re Right doesn’t add any new musical revelations to an already impressive canon. But as a chilling near-farewell taped months before Kurt Cobain left the building, the song — leaked to the Internet and now set for release next month on a Nirvana anthology — is a musical car wreck that’s hard to ignore. Even in a genre that continues to be degraded by imitators, Cobain’s rusty-pipe voice and painful sarcasm (”Things have never been so swell/And I have never felt this well”) are so raw it’s scary. The ultimate in queasy listening.