Dust Brothers, Chemical Brothers, Brothers Johnson — it’s hard to keep ’em all straight. If you need a quick refresher, the Chemical Brothers are the dudes who wrote that song about “Block Rockin’ Beats,” not the brains behind Beck and the Beasties and not the soulful penners of “Strawberry Letter 23.” Like Prodigy, Paul Oakenfold and that guy who wrote the song about how we are all made of stars, the Chems continue to make the most of the tiny electronica ember that failed to turn volcanic on the American public’s ass. Push the Button is an apt title for a couple of Pro Toolers making music by doing exactly that. The duo’s penchant for spaced-out electronic beats and bleep-blooping synth strokes is as predictable as ever, and the album is guilty of dance music’s No. 1 offense: It’s criminally boring. All the Ecstasy in the world couldn’t make this sound interesting. We’ll give this round to the Brothers Johnson.