(Freestyle Dust/Astralwerks) Rather than concoct an actual fol- low-up to Dig Your Own Hole, the Chems dip back into their DJ roots--just in time for the trend toward officially sanctioned mix tapes by everyone from Funkmaster Flex to underground DJs like Carl Cox. Brothers, the Chemicals' second DJ disc, assembles more than an hour of nonstop, seamlessly stitched-together snippets of old R&B, disco clap tracks, Latin beats, and random sound bites. Alternately fun and monotonous, it's little more than the world's grooviest jogging tape.