The new album Unit of Resistance by Raz Mesinai’s Badawi is welcome not only because it is Mesinai’s first new collection since he started branching into film (Sorry, Haters; RomÃ¡ntico; the forthcoming Burning the Future: Coal in America), but also because the album’s guest line-up is the clearest delineator of the how so-called, once-upon “illbient” begat today’s so-called “dubstep.” In addition to Mesinai himself (also known to record his heavily dub-influenced music as Badawi), there’s a mix by DJ Spooky, a key illbient figure. More recent dub-drenched electronic contributors include Kode 9 and DJ/rupture. Up for free download, courtesy of releasing label ROIR, are two very different Resistance tracks. “Market Place” is from Badawi Quintet; it’s a raging piece of acoustic trance, all roiling drums and searing woodwind (MP3). Then there’s the potent “Knife the Etherics,” a gurling mix of industrial mood music by Filastine; it’s truly expert digital dub, never prone to triggered loops, instead morphing as it moves along, from martial drums to rubbery slithers to dire feedback (MP3). More info at razmesinai.com.