I first heard Negativland while working in the Eastern Oregon desert on a fossil dig. A fellow proto-paleontologist from the Bay area popped in a tape of the group’s Over the Edge radio show to entertain us while we worked. The strange noise that came spilling out after he hit Play made us all stop, picks and brushes in mid air, and stare at the tape player, as if it could somehow explain the sounds issuing from its speakers. It couldn’t, of course, and I’m not sure I can adequately describe what Negativland does, either. But here goes: The collective takes found sounds and remixes, reforms, and basically turns them upside down to create complex aural collages laced with sharp political wit. Over 20 years, Negativland has released 18 CDs, one video, and a book, as well as the soundtrack to the award-winning documentary The Ad and the Ego. And you know the phrase “culture jamming”? Negativland came up with that, too. And then there was that whole U2 thing. And that radio show is still going. Negativland has been so busy recombining, producing, and publishing, it has forgotten to tour for ages. When the “True/False 2000” show finally hits the stage in D.C., it will have been in development for close to seven years. What the group has come up with in the meantime is anyone’s guess. I’m thinking something along the lines of the Residents meet Jello Biafra, but with Negativland, I know to expect just about anything. At 6 p.m. Thursday, May 4, at the 9:30 Club, 815 V St. NW. $15. (202) 393-0930. (Lisa Locker) NOTE: THESE ARE UNCORRECTED. PLEASE SEE GREENS AND LASERS FOR CORRECTIONS.