Riddim Clash is a classic soundclash for a post-postmodern world-only the combatants are post-dub, post-hip-hop and post-punk. The face-off between DJ Spooky and Twilight Circus Dub Soundsystem brings on ital sounds of Lee Scratch Perry proportions-check “Phase Anansi” with its funky Hammond-and also slow, funky, siren-laden street grit. And just to convince you that this match-up has versions galore, listen to how they twist the Cure’s “Love Cats” into their own “Dust Storm.”