On Born in the Echoes, The Chemical Brothers immediately put a couple things to great use: their wide-ranging sonic palette and an equally impressive Rolodex. But while friends like Beck, St. Vincent, and Q-Tip star on a mix of sometimes-breezy, sometimes-bumpin' pop and dance tunes, the Chems never turn their back on their underground roots. “Just Bang” is a classic, acid-inspired breakbeat track, while the breathy synth-scape “Radiate” will keep you guessing about what’s next.