Brothers Luther (guitar/vocals) and Cody (percussion, piano, etc.) Dickinson are the stripped down members of this aggressive, uncompromising group whose dedication to the raw, rural blues of R.L. Burnside and Mississippi Fred McDowell (both of whose songs they cover here), along with the backwoods fife music of Otha Turner, has informed eight previous albums and helped make Luther a sort of go-to guitarist for bands, like the Black Crowes, looking for some rootsy credibility. Even though the Allstars have occasionally mixed rugged hip-hop and psychedelic rock into this dusky stew, they have never abandoned the gutsy soul at their core and the duo’s credentials remain impeccable. Despite the jump to a major label, that doesn’t change on Prayer for Peace, the hard touring band’s eighth platter and first studio effort since 2013’s suitably titled breakthrough World Boogie is Coming. Instead of shifting towards a commercial middle ground, the twosome doubles down on their dusky, swamp infested, high wattage basic blues and boogie. It’s an approach made clear on the opening title track that, with its driving drums, Luther’s grinding guitar, darkly bubbling bass from ex-Allman Brothers Band member Oteil Burbridge and pulsating fife, sets the disc’s murky tone.